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Article View: comp.os.ms-windows.programmer.misc
Article #2584

VB2 bug?

#2584
From: ROSS GARNER
Date: Fri, 08 Jan 1993 00:49
68 lines
2142 bytes
I have found a problem when using some API functions with VB2. The code is 
included below, but this is what happens:

1. I create a pen and brush indirect that I can reference anywhere in 
the program by using the assigned handle.

2. I then draw a rectangle

3. I then draw another rectangle in a dirrent location

At this point everything is OK

4. If I include the VB command ForeColor=stuff between drawing the 2 
rectangles then the pen information is lost and the second rectangle 
uses a different pen.

Questions:  Why does this happen????
	    How can the forecolor command destroy? my pen indirect?
	    Is it a bug?
	    Has anyone else come across this?
	    What else destroys? my pen indirect?

Ross Garner
Telecom Research Laboratories


The Code:

DefInt A-Z
Dim lp As pointapi
Dim Brush As LogBrush
Dim pen As LogPen

Sub Command1_Click ()
    Cls
    scalemode = 3           'set Vb mode to pixels

    '*** make brush ****
    Brush.lbstyle = BS_HATCHED
    Brush.lbcolor = RGB(255, 255, 5)
    Brush.lbhatch = HS_FDIAGONAL
    
    '****make pen******
    lp.px = 4           'set width of line
    pen.lopnstyle = PS_dash
    pen.lopnwidth = lp
    pen.lopncolor = RGB(0, 0, 0)
    
    '*********select brush and pen*******
    hBrush = CreateBrushIndirect(Brush)
    hPen = CreatePenIndirect(pen)
    ok = selectobject(hDC, hBrush)
    ok = selectobject(hDC, hPen)
    
    ok = rectangle(hDC, 10, 10, 100, 100)       'draw first rect

    forecolor = RGB(34, 34, 34)

    ok = rectangle(hDC, 200, 10, 300, 100)         'draw second rect
    
    '*********delete objects**********
    ok = DeleteObject(hBrush)
    ok = DeleteObject(hPen)

End Sub

The end.........
Ross Garner
Technical Details
Message-ID: <rgarner.4.0@TRL.OZ.AU>
Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!titan!tmp_ip_070.trl.OZ.AU!rgarner

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Newsgroups: comp.os.ms-windows.programmer.misc
Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!titan!tmp_ip_070.trl.OZ.AU!rgarner
From: rgarner@TRL.OZ.AU (ROSS GARNER)
Subject: VB2 bug?
Message-ID: <rgarner.4.0@TRL.OZ.AU>
Summary: Losing pen data
Lines: 68
Sender: root@trl.oz.au (System PRIVILEGED Account)
Organization: Telecom Research
Date: Fri, 8 Jan 1993 00:49:27 GMT