CONTRASTDLGPARAMS

typedef struct _CONTRASTDLGPARAMS
{
   L_UINT uStructSize;
   pBITMAPHANDLE pBitmap;
   L_BOOL bZoomToFit;
   L_INT nChange;
   L_UINT32 uDlgFlags;
   LTCOMMDLGHELPCB pfnHelpCallback;
   L_VOID  *pHelpCallBackUserData;
} CONTRASTDLGPARAMS,  * LPCONTRASTDLGPARAMS;

The CONTRASTDLGPARAMS structure provides information used to initialize the dialog box created by the LDialogColor::DoModalContrast function. After the user closes the dialog box, information about the user's selections are updated in this structure.

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)".
nChange	Amount to change the contrast. The contrast ranges 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_CONTRAST_SHOW_CONTEXTHELP	[0x00000002] dialog should contain a context sensitive help icon.
pfnHelpCallback	Ignored.
pHelpCallBackUserData	Ignored.