rc (LONG) - returns

Return Codes.

On completion, the handling routine must return a LONG integer (cHits), indicating, where appropriate, whether correlation hits have been detected:

GPI_OK

Successful
GPI_HITS
Successful with correlation 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_BITMAP_IS_SELECTED
PMERR_BITMAP_NOT_SELECTED
PMERR_COORDINATE_OVERFLOW
PMERR_DEV_FUNC_NOT_INSTALLED
PMERR_EXCEEDS_MAX_SEG_LENGTH
PMERR_HBITMAP_BUSY
PMERR_HDC_BUSY
PMERR_HUGE_FONTS_NOT_SUPPORTED
PMERR_INCOMPATIBLE_BITMAP
PMERR_INCORRECT_DC_TYPE
PMERR_INSUFFICIENT_MEMORY
PMERR_INV_BACKGROUND_COL_ATTR
PMERR_INV_BITMAP_DIMENSION
PMERR_INV_BITBLT_MIX
PMERR_INV_BITBLT_STYLE
PMERR_INV_COLOR_ATTR
PMERR_INV_COLOR_DATA
PMERR_INV_COLOR_FORMAT
PMERR_INV_COLOR_INDEX
PMERR_INV_COLOR_OPTIONS
PMERR_INV_COLOR_START_INDEX
PMERR_INV_COORD_SPACE
PMERR_INV_COORDINATE
PMERR_INV_DC_DATA
PMERR_INV_DC_TYPE
PMERR_INV_DRIVER_NAME
PMERR_INV_HBITMAP
PMERR_INV_HDC
PMERR_INV_ID
PMERR_INV_IN_AREA
PMERR_INV_IN_PATH
PMERR_INV_INFO_TABLE
PMERR_INV_LENGTH_OR_COUNT
PMERR_INV_PATTERN_SET_ATTR
PMERR_INV_PATTERN_SET_FONT
PMERR_INV_PICK_APERTURE_POSN
PMERR_INV_SCAN_START
PMERR_INV_USAGE_PARM
PMERR_UNSUPPORTED_ATTR_VALUE

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