rc (LONG) - returns

Return Code.

On completion, the handling routine must return an integer (cHits) indicating, where appropriate, whether correlation hits were detected:

GPI_OK

Successful
GPI_HITS
Successful with correlate hit (returned by display drivers when the correlate flag is ON, and a hit is detected)
GPI_ERROR
Error
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_BASE_ERROR PMERR_COORDINATE_OVERFLOW
PMERR_EXCEEDS_MAX_SEG_LENGTH
PMERR_HDC_BUSY
PMERR_HRGN_BUSY
PMERR_HUGE_FONTS_NOT_SUPPORTED
PMERR_INSUFFICIENT_MEMORY
PMERR_INV_IN_AREA
PMERR_INV_MARKER_SYMBOL_ATTR
PMERR_PATH_LIMIT_EXCEEDED
PMERR_UNSUPPORTED_ATTR
PMERR_UNSUPPORTED_ATTR_VALUE

Refer to the "Error Explanations" section in the Presentation Manager Programming Reference for further explanation.