## Presentation Device Driver Reference for OS/2

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### GreGetStyleRatio - Parameters

hdc (HDC) - input The device context handle.

pRatio (PBYTE) - input A pointer to a style ratio value.

The style ratio is defined as a 2-byte value. The low-order byte indicates a step in the X-direction, the high-order byte a step in the Y-direction.

pInstance (PVOID) - input A pointer to instance data.

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

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 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_INV_HDC