GETSETSCREENPARAMS

short Escape(hdc, GETSETSCREENPARAMS, sizeof(SCREENPARAMS),lpInData,lpOutData)

The GETSETSCREENPARAMS printer escape retrieves or sets the current screen information for rendering halftones.

Parameters

hdc

HDC Identifies the device context.

lpInData

SCREENPARAMS FAR * Points to a SCREENPARAMS structure that contains the new screen information. For more information about this structure, see the following Comments section. This parameter may be NULL.

lpOutData

SCREENPARAMS FAR * Points to a SCREENPARAMS structure that retrieves the previous screen information. For more information about this structure, see the following Comments section. This parameter may be NULL.

Return Value

The return value specifies the outcome of the escape. This value is positive if the escape is successful. Otherwise, it is negative.

Comments

This escape affects how device-independent bitmaps (DIBs) are rendered and how color objects are filled.

The SCREENPARAMS structure has the following form:

typedef struct tagSCREENPARAMS {
  int   angle;
  int   frequency;
} SCREENPARAMS;

Following are the members of the SCREENPARAMS structure:

angle

Specifies, in degrees, the angle of the halftone screen.

frequency

Specifies, in dots per inch, the screen frequency.