Transparency and Bitmap.GetHBitmap method

[Guest]

Hi,

I'm trying to develop a COM interface in C# that would provide a bitmap
handle. In that DLL i do have a Bitmap object and i'm using the GetHbitmap
method to create a new similar bitmap and get its handle.

Everything seems to work well, except when there is some transparent zones
in the bitmap, the transparency color is changed in blue (default) right
after calling the GetHBitmap method.

Is there any way to avoid having the transparent color changed to blue ?

thx for any help.

 

[Bob Powell [MVP]]

AFAIK GetHBitmap creates a 24bpp image internally so you'll lose all the
alpha information.

--
Bob Powell [MVP]
Visual C#, System.Drawing

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