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

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