HISTOCONTRASTDLGPARAMS

typedef struct _HISTOCONTRASTDLGPARAMS 
{ 
   L_UINT uStructSize; 
   pBITMAPHANDLE pBitmap; 
   L_BOOL bZoomToFit; 
   L_INT nChange; 
   L_UINT32 uDlgFlags; 
   LTCOMMDLGHELPCB pfnHelpCallback; 
   L_VOID  *pHelpCallBackUserData; 
} HISTOCONTRASTDLGPARAMS,  * LPHISTOCONTRASTDLGPARAMS;

The HISTOCONTRASTDLGPARAMS structure provides information used to initialize the dialog box created by the LDialogColor::DoModalHistoContrast 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 be "Normal (1:1)".

 

nChange Amount to change the contrast. Possible values range from -1000 to 1000. Negative numbers decrease the contrast and positive numbers increase the contrast.
uDlgFlags User interface flags for this dialog, which determine the layout and action of the dialog. Possible values are:
  Value Meaning
  DLG_HISTOCONTRAST_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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