Image.FromHbitmap exception: A generic error occurred in GDI+

Question

I am trying to create bitmap from dib handle in order to show it in picturebox . But i keep getting this error and not sure how to fix this problem. I did search for error in online and most resources points out that the inptr is zero so error pops up. but thats not my case.

Can anyone explain me how to fix this.

Answer 1

I think that you can't draw Device Independent Bitmap directly with GDI+ as it doesn't use the bitmap header of the bitmap. You need to create your own DIBSection and apply to it first (Ignore (3) because you're not drawing towards the DIBSection with GDI+).

You can refer to how to do it here (It's in C++ code but not too difficult to relate it to C#, as except the GetDC() call will be Graphics.GetHdc() and ReleaseDC() will be Graphics.ReleaseHdc(), the other things will be calling P/Invoke to corresponding GDI APIs.

Remember to call DeleteObject() to free the DIBSection afterwards.