How to check if image has an alpha channel
See the question and my original answer on StackOverflowYou can use the IWICPixelFormatInfo2::SupportsTransparency method. Note this interface may not be always supported though.
Simon Mourier's blog (1807 answers on StackOverflow) about Microsoft technologies C#, C/C++, .NET, WinRT, WinUI3, AOT, P/Invoke, COM, Interop, DirectX, Direct2D, Windows, ...