VB Picture Box Equivalent

[Guest Close Jeffrey R. Radue]

Forgive me if this is a simple question, but how do you use create an area on a dialog which can be drawn on like a VB picture box. I need an area which has an hDC property and can draw in pixel units. Can this be done using DDT to create the dialog?

TIA

Jeff

[Lance Edmonds Member Find all posts View Profile Close Lance Edmonds]

Absolutely! My personal favorite technique is you use a label control as the "container".

1. Add the %WS_CLIPCHILDREN style to your DDT dialog.
2. Create a LABEL control, with the style %SS_GRAYFRAME
3. In the %WM_PAINT event, get the DC of the LABEL control, and draw your graphics.

Here is a snippet from one of my own applications that uses a DDT label control as a container for graphics:

CALLBACK FUNCTION dlgcallback()
    ...
    IF CBMSG = %WM_PAINT THEN
        ' Set the client area of the dialog dark for effect
        hDC = BeginPaint(CBHNDL, Ps)
        GetClientRect CBHNDL, Rct
        FillRect hDC, Rct, GetStockObject(%DKGRAY_BRUSH)
        EndPaint CBHNDL, Ps

        ' Get the DC to the label control and draw the graphics
        hDC = GetDC(GetDlgItem(CBHNDL, %ID_LABEL))
        TextOut hDC, ....more graphics...
        ReleaseDC GetDlgItem(CBHNDL, %ID_LABEL), hDC

        ' signal DDT engine we processed the event ourselves
        FUNCTION = 1
        EXIT FUNCTION
    ELSEIF...
        ...

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Lance
PowerBASIC Support
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