GRAYSCALEDLGPARAMS

typedef struct _GRAYSCALEDLGPARAMS 
{ 
   L_UINT uStructSize; 
   pBITMAPHANDLE pBitmap; 
   L_BOOL bZoomToFit; 
   L_INT nRedFactor; 
   L_INT nGreenFactor; 
   L_INT nBlueFactor; 
   L_UINT32 uDlgFlags; 
   LTCOMMDLGHELPCB pfnHelpCallback; 
   L_VOID  *pHelpCallBackUserData; 
} GRAYSCALEDLGPARAMS,  * LPGRAYSCALEDLGPARAMS;

The GRAYSCALEDLGPARAMS structure provides information used to initialize the dialog box created by the LDialogColor::DoModalGrayScale function. After the user closes the dialog box, this structure is updated with information about the user's selections.

Member Description
uStructSize Size of this structure, in bytes. Use the sizeof operator to calculate this value.
pBitmap Ignored.
bZoomToFit Flag that indicates the initial zoom level for previewing the image. Possible values are:
  Value Meaning
  TRUE Set the initial zoom level to "Zoom to fit".
  FALSE Set the initial zoom level to "Normal (1:1)".

 

nRedFactor Value that represents the percentage or weight given to the red value of each pixel in the bitmap. Possible values are (0-1000), nRedFactor + nGreenFactor + nBlueFactor must equal 1000.
nGreenFactor Value that represents the percentage or weight given to the green value of each pixel in the bitmap. Possible values are (0-1000), nRedFactor + nGreenFactor + nBlueFactor must equal 1000.
nBlueFactor Value that represents the percentage or weight given to the blue value of each pixel in the bitmap. Possible values are (0-1000), nRedFactor + nGreenFactor + nBlueFactor must equal 1000.
uDlgFlags User interface flags for this dialog, which determine the layout and action of the dialog. Possible values are:
  Value Meaning
  DLG_GRAYSCALE_SHOW_CONTEXTHELP [0x00000002] dialog should contain a context sensitive help icon.
pfnHelpCallback Ignored.
pHelpCallBackUserData Ignored.
Help Version 19.0.2017.10.27
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