How to use DrawThemeTextEx in WPF? Getting error -2147467259 when painting custom window caption

[lfmissonb]

Recently, I've been learning how to implement a custom window frame using the tutorial on the Microsoft Docs page: https://learn.microsoft.com/en-us/windows/win32/dwm/customframe.

I followed the steps closely, and most features work correctly except for Painting the Caption Title. When I try to use DrawThemeTextEx, it fails and returns the error code -2147467259.

I found this discussion on Stack Overflow: https://stackoverflow.com/questions/7199386/re-drawing-the-window-title-when-using-custom-chrome-and-dwm. It mentions that WPF uses DirectX for rendering, while DrawThemeTextEx relies on GDI. The post suggests that DirectX and GDI are incompatible in this context.

How can I use DrawThemeTextEx in a WPF?

[lindexi]

I try my demo, but it also return -2147467259 error code. You can find my demo code in https://github.com/lindexi/lindexi_gd/tree/cb002c08cbb0e1aa99c854d0191f05365a131dc6/WPFDemo/JiwhihiboCawneqewhemnur