hdc (HDC) - input

The device context handle.

pRatio (PBYTE) - input

Pointer to two unsigned bytes corresponding to the aspect of the pels on which a line is drawn. The style ratio is defined as a two-byte value. The low-order byte indicates a step in the X-direction, and the high-order byte a step in the Y-direction. Typical values for style ratios are:

• For EGA devices, X-direction equals 64 and Y-direction equals 85. 
  For one-to-one devices, X-direction equals 64 and Y-direction equals 64. In this case, the style ratio steps are set to 64:64 rather than 1:1 to ensure that a single dot in a line-style pattern is a sensible length. The length of a single dot in the pattern is (256/step_value) pels.

  pInstance (PVOID) - input

  A pointer to instance data.

  lFunction (ULONG) - input

  High-order WORD=flags; low-order WORD=NGreSetStyleRatio.

  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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