RGB Color Wizard.
Create your own RGB Color Palette for Form Design.
This special episode focuses on streamlining Form Module code. In our RGB Color Wizard, we use an ActiveX ScrollBar control. It is important to note that ActiveX controls—such as ScrollBars, Sliders, TreeView, and ListView—cannot be instantiated within a standalone class module. As a result, all event procedures for these controls must be written directly in the Form Module.
In this example, three ScrollBar controls are used to represent the Red, Green, and Blue color values, each ranging from 0 to 255. Together, these values combine to generate a full RGB spectrum, logically offering the capability to produce up to 16.7 million distinct colors.
The RGB Color Wizard Image is given below.
Let us take a look at the User Interface of the Color Wizard.
The Wizard Controls.
To the left of the scrollbars, three TextBox controls are positioned. As you move the scrollbar slider left or right, the corresponding color value (ranging from 0 to 255) is displayed in the adjacent TextBox. You can also manually enter numeric values into these TextBoxes to define a specific RGB color.
On the right side of the scrollbars, three Label controls display the intensity of the selected Red, Green, and Blue values, visually resembling a bar graph. The RGB() function then combines the three values to generate the final color, which is prominently shown in the large rectangle control below.
When you’re satisfied with the generated color, click the RGB Color rectangle to select it. Next, choose one of the 25 color boxes to save the new color—this action replaces the existing color in that box with your selection. The corresponding RGB value is also displayed in the RGBColor TextBox located beneath the color box grid.
You can store and maintain a maximum of 25 colors at a time. To apply a saved color to a control—such as a TextBox or Label—for properties like ForeColor, BackColor, or BorderColor, simply highlight the value in the RGB Color TextBox and copy-paste it into the desired property.
For convenience, you can also copy the RGB number directly to the Clipboard by clicking the Label control labeled ‘Copy to Clipboard’ beneath the RGB Color TextBox. Once copied, the RGB value can be pasted wherever needed.
The Form Module Code with the ActiveX Control's OnChange() Event Procedures is given below.
Option Compare Database Option Explicit Private CWiz As CWiz_ObjInit 'Intermediary Class Const GraphFactor = (1 / 255) * 1440 'The Color Graph Width is 1 inch Dim intR As Long, intG As Long, intB As Long Dim cdb As Database, doc As Document Private Sub Form_Load() Set CWiz = New CWiz_ObjInit 'Instantiate CWiz_ObjInit Class Set CWiz.o_Frm = Me 'Assign the Form object to its Property End Sub Private Sub form_Unload(Cancel As Integer) Set CWiz = Nothing End Sub 'ActiveX Control Private Sub Ctl_B_Change() 'Blue Color ScrollBar Control Set cdb = CurrentDb Set doc = cdb.Containers("Forms").Documents("ColorPalette") intB = Ctl_B.Value With Me ![BN] = intB .B.Width = GraphFactor * intB .B.BackColor = RGB(0, 0, intB) .Color.BackColor = RGB(intR, intG, intB) .RGBColor = .Color.BackColor 'Save RGBColor and BN TextBoxes contents in Form Custom Properties doc.Properties("RGBColor").Value = .Color.BackColor doc.Properties("BN").Value = intB .Controls("Color").SpecialEffect = 0 .CheckBox.Value = False End With End Sub 'ActiveX Control Private Sub Ctl_G_Change() Set cdb = CurrentDb Set doc = cdb.Containers("Forms").Documents("ColorPalette") intG = Me.Ctl_G.Value With Me intG = .Ctl_G.Value ![GN] = intG .G.Width = GraphFactor * intG .G.BackColor = RGB(0, intG, 0) .Color.BackColor = RGB(intR, intG, intB) .RGBColor = Color.BackColor doc.Properties("RGBColor").Value = .Color.BackColor doc.Properties("GN").Value = intG .Controls("Color").SpecialEffect = 0 .CheckBox.Value = False End With End Sub 'ActiveX Control Private Sub Ctl_R_Change() Set cdb = CurrentDb Set doc = cdb.Containers("Forms").Documents("ColorPalette") intR = Me.Ctl_R.Value With Me ![RN] = intR .R.Width = GraphFactor * intR .R.BackColor = RGB(intR, 0, 0) .Color.BackColor = RGB(intR, intG, intB) .RGBColor = Color.BackColor doc.Properties("RGBColor").Value = .Color.BackColor doc.Properties("RN").Value = intR .Controls("Color").SpecialEffect = 0 .CheckBox.Value = False End With End Sub
The ScrollBar Controls.
The three ScrollBars, named Ctl_R, Ctl_G, and Ctl_B, correspond to the Red, Green, and Blue colors. When the slider control on each is moved to adjust the color numbers within the range of 0 to 255, the Change Event is triggered. This event records these actions, updating other related controls, such as the TextBox content on the left side. Additionally, it increases the width of the label controls, dynamically displaying color variations based on the selected color number range.
Additionally, the Change event dynamically updates both the RGB color shown in the large rectangular Label control and the corresponding RGB color value displayed in the TextBox beneath the Colors Grid.
Since we cannot create an instance of the ScrollBar ActiveX Control in the standalone Class Module, we are forced to write the Change Event Subroutines in the Form's Class Module.
The ColorWizard and Run-Time Data.
Typically, changes to a control’s ForeColor, BackColor, or BorderColor are made in the Form’s Design View. After updating these property values and saving the Form, the modifications are preserved. The next time the Form is opened, it will display the updated colors applied during design.
With the RGB Color Wizard, however, we modify control properties directly in Form View. Changes made in this mode are temporary—they are not automatically saved and will be lost once the form is closed. A practical solution is to store these settings in a table, so they can be reloaded and applied the next time the form is opened.
Contrary to the conventional approach of using tables for everything, we're opting for a different method. In this case, we'll save the entire data within the form itself. While not a novel concept, this method is rarely employed due to its complexity. Specifically, we'll store the data in the form's custom-made properties, akin to the Tag property of a form or control. Creating these properties with VBA programs is possible, although the route taken for this process is somewhat uncommon.
You can see how these Custom Properties are addressed for storing/retrieving data in them. For an introduction to this method, visit this Link: Saving Data on Forms, Not in a Table to see a simple, practical use of this method.
To preserve data from the ColorGrid, Text Boxes, and other controls during changes or when closing, we implemented custom properties to store this information.
The saving of values to all custom properties occurs when the form is closed. Upon reopening the form, these values are read from the custom properties and displayed on the corresponding controls. These two event procedures are implemented in the CWiz_ObjInit Class Module.
Regarding the ScrollBar Change Event Subroutine, pay attention to the subsequent lines responsible for updating custom properties and the method employed to address and store values into them:
Set cdb = CurrentDb Set doc = cdb.Containers("Forms").Documents("ColorPalette") . . . doc.Properties("RGBColor").Value = .Color.BackColor doc.Properties("BN").Value = intB .
Before saving the values into the Custom Properties, we must create the Properties on the Form. This is a one-time exercise.
Sample Custom Property Management VBA Code.
Let us see an example of creating a Custom Property to save an Employee's Name in Form1. Sample VBA Code is given below:
'Create a Custom Property in Form1 Private Sub CreateProperty() Dim db As Database Dim doc As Document Dim prp As Property Set db = CurrentDb Set doc = db.Containers("Forms").Documents("Form1") Set prp = doc.CreateProperty("EmpName", dbText, "SampleText") doc.Properties.Append prp Set prp = Nothing Set doc = Nothing Set db = Nothing End Sub 'Assign a value to Custom Property in Form1 Private Sub AssignPropertyValue() Dim db As Database Dim doc As Document Set db = CurrentDb Set doc = db.Containers("Forms").Documents("Form1") doc.Properties("EmpName").Value = "Michael Colins" Set doc = Nothing Set db = Nothing End Sub 'Create a Custom Property in Form1 Private Sub ReadPropertyValue() Dim db As Database Dim doc As Document Dim strName As String Set db = CurrentDb Set doc = db.Containers("Forms").Documents("Form1") strName = doc.Properties("EmpName").Value MsgBox "Name: " & UCase(strName) Set doc = Nothing Set db = Nothing End Sub 'Create a Custom Property in Form1 Private Sub DeleteProperty() Dim db As Database Dim doc As Document Set db = CurrentDb Set doc = db.Containers("Forms").Documents("Form1") doc.Properties.Delete "EmpName" Set doc = Nothing Set db = Nothing End Sub
All the procedures for creating a custom property to save an employee's name, assigning a name to the property, reading it back, displaying it in a message box, and deleting the custom property from Form1 are outlined in the individual subroutines above.
The CWiz_TextBox Wrapper Class.
The CWiz_TextBox Wrapper Class manages the AfterUpdate() Event, allowing for direct entry of color numbers for Red, Green, and Blue into the TextBoxes named RN, GN, and BN. The subsequent changes are seamlessly reflected in the Scrollbars, the color graphs situated to the right of the Scrollbars, the new color showcased in the large rectangle label background, and the RGB color number displayed in the Textbox.
You may save your new Color in the Color Grid as explained earlier.
The CWiz_TextBox Wrapper Class Module Code is given below:
Option Compare Database Option Explicit Private WithEvents ctxt As Access.TextBox Private cFrm As Form Const GraphFactor = (1 / 255) * 1440 Private db As Database Private doc As Document Public Property Get c_Frm() As Form Set c_Frm = cFrm End Property Public Property Set c_Frm(ByRef vcFrm As Form) Set cFrm = vcFrm End Property Public Property Get c_txt() As Access.TextBox Set c_txt = ctxt End Property Public Property Set c_txt(ByRef vctxt As Access.TextBox) Set ctxt = vctxt Set db = CurrentDb Set doc = db.Containers("Forms").Documents("ColorPalette") End Property Private Sub ctxt_AfterUpdate() With cFrm Select Case ctxt.Name Case "RN" .Ctl_R.Value = cFrm![RN] doc.Properties("RN").Value = cFrm!RN .CheckBox.Value = False Case "GN" .Ctl_G.Value = cFrm![GN] doc.Properties("GN").Value = cFrm!GN .CheckBox.Value = False Case "BN" .Ctl_B.Value = cFrm![BN] doc.Properties("BN").Value = cFrm!BN .CheckBox.Value = False End Select End With End Sub
The CWiz_Label Wrapper Class.
The Labels in the ColorGrid, the color graph Labels beside the ScrollBars, and the RGB color display Label are all managed through their Click event subroutines within the CWiz_Label Wrapper Class.
The CWiz_Label Wrapper Class Module Event Procedure Code is given below:
Option Compare Database Option Explicit Private WithEvents clbl As Access.Label Private sFrm As Form Const GraphFactor = (1 / 255) * 1440 Private db As Database Private doc As Document Private selflag As Boolean Private lngColor As Long Public Property Get s_Frm() As Form Set s_Frm = sFrm End Property Public Property Set s_Frm(ByRef vsFrm As Form) Set sFrm = vsFrm End Property Public Property Get s_clbl() As Access.Label Set s_clbl = clbl End Property Public Property Set s_clbl(ByRef vclbl As Access.Label) Set clbl = vclbl Set db = CurrentDb Set doc = db.Containers("Forms").Documents("ColorPalette") End Property Private Sub clbl_Click() Dim I As Integer If Val(Mid(clbl.Name, 5)) > 0 Then I = Val(Mid(clbl.Name, 5)) End If Select Case I Case 1 To 25 Call Boxes(I) 'Click on Color Grid End Select Select Case clbl.Name Case "Color" Call ColorClick 'Click on the RGB Color Display Label Case "Clip" Call ClipClick 'Click on this Labek to Copy RGB Color number to ClipBoard End Select End Sub Private Sub ColorClick() With sFrm lngColor = .Color.BackColor !RGBColor = .Controls("Color").BackColor .Controls("Color").SpecialEffect = 2 'Copy the created color to the grid !CheckBox.Value = True End With End Sub Private Sub ClipClick() If Not IsNull(sFrm![RGBColor]) Then ' Copy the TextBox contents to the clipboard sFrm.RGBColor.SetFocus DoCmd.RunCommand acCmdCopy MsgBox "RGB Color Number Copied to Clipboard!", vbInformation Else ' Display a message if the TextBox is empty MsgBox "RGBColor is empty!", vbExclamation End If End Sub Private Sub Boxes(ByVal bx As Integer) Dim j As Integer Dim ctl As String Dim Colr As Long Dim intR As Integer Dim intG As Integer Dim intB As Integer selflag = sFrm!CheckBox.Value For j = 1 To 25 If j = bx Then If selflag Then With sFrm ctl = "lblC" & j .Controls(ctl).SpecialEffect = 2 .Controls(ctl).BackColor = .Color.BackColor doc.Properties("Selected").Value = .Controls(ctl).BackColor !RGBColor = .Controls(ctl).BackColor !CheckBox.Value = False ctl = "C" & j doc.Properties(ctl).Value = .Color.BackColor doc.Properties("Selctl").Value = "C" & j End With Else With sFrm ctl = "lblC" & j !RGBColor = .Controls(ctl).BackColor .Controls(ctl).SpecialEffect = 2 doc.Properties("Selected").Value = .Controls(ctl).BackColor doc.Properties("Selctl").Value = "C" & j End With Colr = sFrm!RGBColor 'Split into R,G,B intR = Colr Mod 256 intG = Colr \ 256 Mod 256 intB = Colr \ 256 \ 256 Mod 256 With sFrm !RN = intR .Ctl_R.Value = sFrm!RN !GN = intG .Ctl_G.Value = sFrm!GN !BN = intB .Ctl_B.Value = sFrm!BN .R.Width = GraphFactor * intR .G.Width = GraphFactor * intG .B.Width = GraphFactor * intB .R.BackColor = RGB(intR, 0, 0) .G.BackColor = RGB(0, intG, 0) .B.BackColor = RGB(0, 0, intB) .Color.BackColor = RGB(intR, intG, intB) End With With doc .Properties("RGBColor").Value = sFrm.Color.BackColor .Properties("RN").Value = intR .Properties("GN").Value = intG .Properties("BN").Value = intB End With End If Else ctl = "lblC" & j sFrm.Controls(ctl).SpecialEffect = 0 End If Next End Sub
The Intermediary Class Module CWiz_ObjInit VBA Code is given below:
Option Compare Database Option Explicit Private cw As CWiz_Label Private txt As CWiz_TextBox Private WithEvents cmd As CommandButton Private WithEvents frm As Form Private coll As New Collection Const GraphFactor = (1 / 255) * 1440 Const MaxColor = 25 Private cdb As Database, ctr As Container, doc As Document Public Property Get o_Frm() As Form Set o_Frm = frm End Property Public Property Set o_Frm(ByRef voFrm As Form) Set frm = voFrm Call Class_Init End Property Private Sub Class_Init() Dim ctl As Control Const EP = "[Event Procedure]" Dim I As Integer Call ColorPalette_Init 'Initialize Set cmd = frm.cmdClose cmd.OnClick = EP For Each ctl In frm.Controls I = Val(Mid(ctl.Name, 5)) Select Case TypeName(ctl) Case "Label" Select Case I Case 1 To 25 Set cw = New CWiz_Label Set cw.s_Frm = frm Set cw.s_clbl = ctl cw.s_clbl.OnClick = EP coll.Add cw Set cw = Nothing End Select Select Case ctl.Name Case "Color" Set cw = New CWiz_Label Set cw.s_Frm = frm Set cw.s_clbl = ctl cw.s_clbl.OnClick = EP coll.Add cw Set cw = Nothing Case "Clip" Set cw = New CWiz_Label Set cw.s_Frm = frm Set cw.s_clbl = ctl cw.s_clbl.OnClick = EP coll.Add cw Set cw = Nothing End Select Case "TextBox" Select Case ctl.Name Case "RN", "GN", "BN" Set txt = New CWiz_TextBox Set txt.c_Frm = frm Set txt.c_txt = ctl txt.c_txt.AfterUpdate = EP coll.Add txt Set txt = Nothing Case "RGBColor" Set txt = New CWiz_TextBox Set txt.c_Frm = frm Set txt.c_txt = ctl txt.c_txt.OnGotFocus = EP coll.Add txt Set txt = Nothing End Select End Select Next End Sub Private Sub ColorPalette_Init() Dim xRN As Integer Dim xGN As Integer Dim xBN As Integer Dim xRGBColor As Long Dim j As Integer Dim cdb As Database Dim ctr As Container Dim doc As Document Dim strctl As String Set cdb = CurrentDb Set ctr = cdb.Containers("Forms") Set doc = ctr.Documents("ColorPalette") xRN = doc.Properties("RN").Value xGN = doc.Properties("GN").Value xBN = doc.Properties("BN").Value xRGBColor = doc.Properties("RGBColor").Value With frm ![RN] = xRN ![GN] = xGN ![BN] = xBN .R.Width = xRN * GraphFactor .R.BackColor = RGB(xRN, 0, 0) .G.Width = xGN * GraphFactor .G.BackColor = RGB(0, xGN, 0) .B.Width = xBN * GraphFactor .B.BackColor = RGB(0, 0, xBN) .Ctl_R.Value = xRN .Ctl_G.Value = xGN .Ctl_B.Value = xBN .Color.BackColor = RGB(xRN, xGN, xBN) .RGBColor = .Color.BackColor End With For j = 1 To MaxColor strctl = "lblC" & j frm.Controls(strctl).BackColor = doc.Properties("C" & j).Value If ("C" & j) = doc.Properties("Selctl").Value Then frm.Controls(strctl).SpecialEffect = 2 End If Next j Form_Load_Exit: Exit Sub Form_Load_Err: MsgBox Err.Description, , "Form_Load" Resume Form_Load_Exit End Sub Private Sub cmd_Click() Dim msg As String Dim ctl As String, strC1 As String, j As Integer msg = "Close the Color Wizard?" If MsgBox(msg, vbYesNo + vbQuestion, "cmd_Click()") = vbYes Then Set cdb = CurrentDb Set ctr = cdb.Containers("Forms") Set doc = ctr.Documents("ColorPalette") For j = 1 To MaxColor ctl = "lblC" & j strC1 = "C" & j doc.Properties(strC1).Value = frm.Controls(ctl).BackColor If frm.Controls(ctl).SpecialEffect = 2 Then doc.Properties("Selected").Value = frm.Controls(ctl).BackColor doc.Properties("SelCtl").Value = strC1 End If Next doc.Properties("RGBColor").Value = Nz(frm.Controls("RGBColor").Value, 0) DoCmd.Close acForm, frm.Name End If End Sub Private Sub Class_Terminate() Do While coll.Count > 1 coll.Remove 1 Loop End Sub
When the form is opened, the form object is passed to the intermediary class module, initiating the execution of the Class_Init subroutine. The first subroutine, ColorPalette_Init, is invoked from within the Class_Init subroutine. This procedure retrieves all the values saved in the form's custom properties and assigns them to the labels, scroll bars, and text boxes on the form.
This procedure is normally run in the Form_Load() Event Procedure, and the current Values on the Form Controls are saved when the Form is closed.
There is a single command button to close the form. A singular command button object instance is created in the Intermediary Class Module, and its Click Event is enabled. Consequently, when the cmdClose command button is clicked, the form close event procedure is executed in the CWiz_ObjInit Module. Before closing the form, all the values of the Color Wizard form controls are saved in the form's custom properties.
This topic was initially published in October 2010, featuring a color palette of 15 colors, and all the wizard VBA code was implemented in the Form Module. The older version of the wizard form is included in the demo database, labeled ColorPaletteOld. Feel free to open and review the code, assessing how it has been transformed into a form that can now be executed from the standalone class module, excluding the VBA code related to the ActiveX Control ScrollBar.
Demo Database Download Link.
Streamlining Form Module Code in Standalone Class Module.
- Reusing Form Module VBA Code for New Projects.
- Streamlining Form Module Code - Part Two.
- Streamlining Form Module Code - Part Three
- Streamlining Form Module Code - Part Four
- Streamlining Form Module Code - Part Five
- Streamlining Form Module Code - Part Six
- Streamlining Form Module Code - Part Seven
- Streamlining Form Module Code - Part Eight
- Streamlining Form Module Code - Part Nine
- Streamlining Form Module Code - Part Ten
- Streamlining Form Module Code - Part Eleven
- Streamlining Report Module Code in Class Module
- Streamlining Module Code Report Line Hiding-13.
- Streamlining Form Module Code Part-14.
- Streamlining Custom Made Form Wizard-15.
- Streamlining VBA Custom Made Report Wizard-16.
- Streamlining VBA External Files List in Hyperlinks-17
- Streamlining Events VBA 3D Text Wizard-18
- Streamlining Events VBA RGB Color Wizard-19
- Streamlining Events Numbers to Words-20
- Access Users Group(Europe) Presentation-21
- The Event Firing Mechanism of MS Access-22
- One TextBox and Three Wrapper Class Instances-23
- Streamlining Code Synchronized Floating Popup Form-24
- Streamlining Code Compacting/Repair Database-25
- Streamlining Code Remainder Popup Form-26
- Streamlining Code Editing Data in Zoom-in Control-27
- Streamlining Code Filter By Character and Sort-28
- Table Query Records in Collection Object-29
- Class for All Data Entry Editing Forms-30
- Wrapper Class Module Creation Wizard-31
- wrapper-class-template-wizard-v2