I had a application using wxWidgets 2.8.0 and then 2.8.8 in production. There were some bugs in earlier wxWidgets versions on Linux, so printing was not working properly. I decided to upgrade wx and that fixed it. Now I wanted to use the same version for Windows version of my application. I originally used some (now old) MinGW version and just wanted to rebuild and be done. But, I got build errors instead. I don’t really last time wxWidgets failed to build so I asked at mailing list and finally dug into the source code myself.

It looks like wx code is all fine, but there are problems in MinGW headers. I particular, you need to edit the file C:\MinGW\include\winspool.h and change DocumentPropertiesW function’s signature from:

LONG WINAPI DocumentPropertiesW(HWND,HANDLE,LPWSTR,PDEVMODEA,PDEVMODEA,DWORD);

to:

LONG WINAPI  DocumentPropertiesW(HWND,HANDLE,LPWSTR,PDEVMODEW,PDEVMODEW,DWORD);

It seems to be already fixed in newer MinGW versions.