An application can specify class-specific data for a frame window by passing to WinCreateWindow a pointer to the FRAMECDATA structure. The class-specific data contains the frame-control flags (FCF_ flags), resource-module handle, and resource identifier to be used when creating the frame window. The resource-module handle and the resource identifier specify where to find resources for the frame window.

Supplying class-specific data with WinCreateWindow is similar to using WinCreateStdWindow without creating a client window.