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12/30/2002 at 02:14AM PST, ID: 20439144
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7.8

Problem using TransparentBlt() without using PictureBox

Asked by Da533 in Game Programming

Tags: transparentblt, problem, using, picturebox

Ok..   im trying to use transparentblt(...) so that i dont have to go through all the trouble of creating a mask for each of my images... and i also dont like having all my images cluttered up in pictureboxes either...

here is my code (broken down):

Dim imgDC As Long
dim xSrc As Integer, ySrc As Integer

imgDC = LoadGraphicDC(App.Path & "\fgtest.gif")

TransparentBlt Me.hDC, 0, 0, 100, 100, imgDC, xSrc, ySrc, 100, 100, vbBlack

'END CODE

Here is the code for the LoadGraphicDC() Function:

Public Function LoadGraphicDC(sFileName As String) As Long
On Error Resume Next

Dim LoadGraphicDCTEMP As Long

LoadGraphicDCTEMP = CreateCompatibleDC(GetDC(0))
SelectObject LoadGraphicDCTEMP, LoadPicture(sFileName)

LoadGraphicDC = LoadGraphicDCTEMP
End Function

...  so i guess you wanna know the problem  ...  

The problem is that when i change xSrc and ySrc in the first set of code, it does not change the output.  The transparency works great, but it reads from 0,0 no matter what.  the only way i have been able to get is to work is if i use picture boxes instead (which i really dont want to have to do). Does anyone know how i could fix this?
 
Keywords: Problem using TransparentBlt() with…
 
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[+][-]01/02/03 12:51 PM, ID: 7658010

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About this solution

Zone: Game Programming
Tags: transparentblt, problem, using, picturebox
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Solution Provided By: J_Z
Participating Experts: 3
Solution Grade: A
 
 
[+][-]01/19/03 06:52 PM, ID: 7758758

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[+][-]09/30/03 11:55 PM, ID: 9464294

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[+][-]11/21/03 05:22 PM, ID: 9801216

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