Return
codes.
This function returns an integer (lComplexity) indicating the complexity
of the DC region:
RGN_ERROR
RGN_NULL
RGN_RECT
RGN_COMPLEX
Complex region (more than 1 rectangle)
Possible Errors Detected: When an error
is detected, the handling routine must call WinSetErrorInfo to post the
condition. Error codes for conditions that the handling routine is expected
to check include:
PMERR_DEV_FUNC_NOT_INSTALLED PMERR_HDC_BUSY
PMERR_INSUFFICIENT_MEMORY
PMERR_INV_COORDINATE
PMERR_INV_HDC
PMERR_INV_HRGN
PMERR_INV_RECT
PMERR_INV_REGION_CONTROL
Refer to the "Error Explanations"
section in the Presentation Manager Programming Reference for further
explanation.