I'm learning how to use WiX toolset to create an MSI file. The tutorial that I'm reading guides to using BMP files to customize the default dialogs. I tried here using a PNG file, and it seems to be working fine. Also, I found that using Bitmaps with transparency (which is not part of the original BMP specification) would work fine too.
<WixVariable Id="WixUIDialogBmp" Value="Assets\dialog.png" />
Is this a limitation of an older version of Microsoft Installer or Windows?
Here is the PNG file that I'm using.
Here is there installer running.
Note: I'm using Windows 10 with Windows Installer 5.0.16299.15.