keeping the alpha channel after BitmapCreateFromHBITMAP

[Aaron3569]

Hello!

does anyone knows a way to keep the alpha channel after converting a HBITMAP to BITMAP using BitmapCreateFromHBITMAP. I have read something about using LockBits but i would love to know if there are other ways to do this.

[genius257]

Hi @Aaron3569.

In the docs for _GDIPlus_BitmapCreateHBITMAPFromBitmap the second argument is the background color that should support the alpha channel.

So try this:

_GDIPlus_BitmapCreateHBITMAPFromBitmap($hBitmap , 0x00000000)

You did not provide example code for me to try the solution with, and I'm not feeling like making code to test this solution with currently, but it SHOULD work

Hope it helps!

 

Edit:

I just realized you wanted to use _GDIPlus_BitmapCreateFromHBITMAP instead, my bad . I have some code that does this, so if you provide some example code to demonstrate the issue, I'll take the time to dig through my archive of files

If not, there are solutions if you search enough within this forum 😅.

Edited February 9, 2023 by genius257
Me being an idiot and not initially reading the question right