SendMessage and progress bar colors
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Thread: SendMessage and progress bar colors

  1. #1
    Xeon's Avatar
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    Talking SendMessage and progress bar colors

    Now, I'm trying to change the bar color and background color of a progress bar in VB.
    The way to do this is to send the PBM_SETBARCOLOR and PBM_SETBKCOLOR to the progress bar.
    I coded :
    Code:
    Option Explicit
    
    Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
    Private Const WM_USER = &H400
    Private Const PBM_SETBARCOLOR = (WM_USER + 9)
    Private Const CCM_FIRST = &H2000
    Private Const CCM_SETBKCOLOR = (CCM_FIRST + 1)
    Private Const PBM_SETBKCOLOR = CCM_SETBKCOLOR
    
    //command button......when clicked, fill progress bar
    Private Sub cmdGo_Click()
    
    Dim i As Integer
    For i = 0 To 100
        ProgressBar1.Value = i
    Next i
    
    End Sub
    
    Private Sub Form_Load()
    
    'suppose to be black for progress bar's backgound
    SendMessage ProgressBar1.hwnd, PBM_SETBKCOLOR, _
    0, RGB(0, 0, 0)
    'suppose to be yellow for progress bar's bar
    'color
    SendMessage ProgressBar1.hwnd, PBM_SETBARCOLOR, _
    0, RGB(255, 255, 0)
    
    End Sub
    But for some reasons, the color of both the bar and background of the progress bar always seems to be bright yellowish-green, despite the many different colors I set! Why?
    Does anyone have any idea? I've attached the project to this thread.

    Please and thanks a lot!
    Attached Files Attached Files
    "Hell is calling for you!" - Rufus, from Valkyrie Profile 2 : Silmeria

    "I'm getting tired of you devils.....finishing strike......Final Blast!" - Arngrim, from Valkyrie Profile 2 : Silmeria

  2. #2
    Join Date
    May 2002
    Posts
    40

    Re: SendMessage and progress bar colors

    Try this code :
    Code:
    Option Explicit
    
    Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
    
    Private Sub cmdBackColor_Click()
    ' Change background color  
        On Error GoTo errHandler
    
        With CommonDlg
            .CancelError = True
            'Show common dialog box
            .ShowColor
            ' Change to selected background color
            SendMessage ProgressBar1.hwnd, 8193, 0, ByVal .Color
        End With
    
    Exit Sub
    errHandler:
    End Sub
    
    Private Sub cmdForeColor_Click()
    ' Change foreground color  
        On Error GoTo errHandler
        
        With CommonDlg
            .CancelError = True
            'Show common dialog box
            .ShowColor
            ' Change to selected foreground color
            SendMessage ProgressBar1.hwnd, 1033, 0, ByVal .Color
        End With
        
    Exit Sub
    errHandler:
    End Sub
    
    Private Sub Timer1_Timer()
    
        If ProgressBar1.Value >= ProgressBar1.Max Then ProgressBar1.Value = ProgressBar1.Min
    
        ProgressBar1.Value = ProgressBar1.Value + 1
    
    End Sub
    Efi

  3. #3
    Xeon's Avatar
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    Talking

    Thanks a lot, Efi!

    But what does the '1033' and '8193' means in this case?
    Thanks a lot!
    "Hell is calling for you!" - Rufus, from Valkyrie Profile 2 : Silmeria

    "I'm getting tired of you devils.....finishing strike......Final Blast!" - Arngrim, from Valkyrie Profile 2 : Silmeria

  4. #4
    Join Date
    May 2002
    Posts
    40
    This is the big ''secret''

    Private Const WM_USER = &H400
    ' 1024 is the Decimal value of &H400

    Private Const PBM_SETBARCOLOR = (WM_USER + 9)
    ' 1033 is the Decimal value of &H400 + 9, (1024+9)

    Private Const CCM_FIRST = &H2000
    ' 8192 is the Decimal value of &H2000

    Private Const CCM_SETBKCOLOR = (CCM_FIRST + 1)
    ' 8193 is the Decimal value of &H2000 + 1, (8192+1)

    Efi

  5. #5
    Xeon's Avatar
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    Whoa! Thanks a lot, Efi!
    U must have a Visual Basic decompiler inside your brain, eh? WHoa! Cool!
    "Hell is calling for you!" - Rufus, from Valkyrie Profile 2 : Silmeria

    "I'm getting tired of you devils.....finishing strike......Final Blast!" - Arngrim, from Valkyrie Profile 2 : Silmeria

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