## Presentation Device Driver Reference for OS/2

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### GreQueryFontAttributes - Parameters

hdc (HDC) - input Device context handle.

cbMetrics (LONG) - input Size in bytes of the font metrics buffer.

pfmMetrics (PFONTMETRICS) - input Pointer.

Pointer to font metric block where the information is to be returned.

pInstance (PVOID) - input Pointer to instance data.

lFunction (ULONG) - input High-order WORD=flags; low-order WORD= NGreQueryFontAttributes.

fSuccess (BOOL) - returns Return codes.

On completion, the handling routine must return BOOLEAN (fSuccess).

TRUE Successful
FALSE Error

Possible Errors Detected: When an error is detected, the graphics engine calls WinSetErrorInfo to post the condition. Reasons for failure of this function include:

PMERR_COORDINATE_OVERFLOW
PMERR_DEV_FUNC_NOT_INSTALLED
PMERR_HDC_BUSY
PMERR_INV_COORD_SPACE
PMERR_INV_HDC
PMERR_INV_LENGTH_OR_COUNT
PMERR_INV_SETID

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