ContrastCmdInputParm

This structure supports software control of a platform's display contrast. Use this structure conjunction with the GWES function ExtEscape and the display driver's DrvEscape functions.

struct ContrastCmdInputParm {
  int command;
  int parm;
};

Members

• command
  Contrast command. The following table shows the available contrast commands.

  Contrast command	Description
  CONTRAST_CMD_GET	Gets the current contrast. The parm member is ignored. The return value from DrvEscape should be the current contrast setting.
  CONTRAST_CMD_SET	Sets the current contrast. The parm member contains the desired contrast setting. The return value from DrvEscape should be the actual contrast setting after the operation.
  CONTRAST_CMD_INCREASE	Increases the contrast by the amount specified in parm. The return value from DrvEscape should be the resulting contrast setting.
  CONTRAST_CMD_DECREASE	Decreases the contrast by the amount specified in parm. The return value from DrvEscape should be the resulting contrast setting.
  CONTRAST_CMD_DEFAULT	Applies the default contrast setting. The parm member is ignored. The return value from DrvEscape should be the actual contrast setting after the operation.
  CONTRAST_CMD_MAX	Applies the maximum contrast setting. The return value from DrvEscape should be the actual contrast setting after the operation.

• parm
  Value that applies to some of the contrast commands.

Requirements

OS Versions: Windows CE 2.12 and later.
Header: Pwingdi.h.

See Also

Display Drivers | Display Driver Escape Codes | ExtEscape

 Last updated on Tuesday, May 18, 2004

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