WINDOWLEVELDLGPARAMS

typedef struct _WINDOWLEVELDLGPARAMS
{
   L_UINT            uStructSize ;
   pBITMAPHANDLE pBitmap ;
   L_BOOL            bZoomToFit;
   L_RGBQUAD * pLUT ;
   L_UINT32          uLUTLength ;
   L_UINT            uLowBit ;
   L_UINT            uHighBit ;
   L_INT            nLow ;
   L_INT            nHigh ;
   COLORREF          crStart ;
   COLORREF          crEnd ;
   L_INT             nFactor ;
   L_UINT32          uWindowLevelFlags;
   L_UINT32          uDlgFlags ;
   LTCOMMDLGHELPCB   pfnHelpCallback ;
   L_VOID       *pHelpCallBackUserData ;
} WINDOWLEVELDLGPARAMS,  * LPWINDOWLEVELDLGPARAMS;

The WINDOWLEVELDLGPARAMS structure provides information needed to the LDialogColor::DoModalWindowLevel function.

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)".

pLUT	Pointer to the look-up table, which will be filled by the dialog.
uLUTLength	Length of the look-up table.
uLowBit	Value indicating the low bit used for leveling.
uHighBit	Value indicating the high bit used for leveling.
nLow	Variable to be updated with the low value entered through the dialog.
nHigh	Variable to be updated with the high value entered through the dialog.
crStart	Variable to be updated with the starting color value entered through the dialog.
crEnd	Variable to be updated with the ending color value entered through the dialog.
nFactor	Value that indicates the factor to be applied in the function operation specified in the uWindowLevelFlags parameter. This parameter is used only if uWindowLevelFlags is FILLLUT_EXPONENTIAL, FILLLUT_LOGARITHMIC or FILLLUT_SIGMOID. If FILLLUT_EXPONENTIAL or FILLLUT_SIGMOID flag is selected its value range from 1000 to -1000. If FILLLUT_LOGARITHMIC flag is selected its value range form 0 to 1000. If nFactor = 0, the lookup table will be filled linearly.
uWindowLevelFlags	Flags that indicate how the range is used to fill the LUT and the type of LUT.
	The following flags indicate how the range is used to fill the LUT:
	Value	Meaning
	FILLLUT_INSIDE	[0x0001] Fill the LUT between nLow and nHigh. ( inside the nLow...nHigh range )
	FILLLUT_OUTSIDE	[0x0002] Fill the LUT below nLow and above nHigh. ( outside the nLow...nHigh range )
	The following flags indicate the LUT type:
	Value	Meaning
	FILLLUT_LINEAR	[0x0010] LUT is linear.
	FILLLUT_EXPONENTIAL	[0x0020] LUT is exponential.
	FILLLUT_LOGARITHMIC	[0x0030] LUT is logarithmic.
	FILLLUT_SIGMOID	[0x0040] LUT is sigmoid.

uDlgFlags	User interface flags for this dialog which determines the layout and action of the dialog. Possible values are:
	Value	Meaning
	DLG_WINDOWLEVEL_AUTOPROCESS	[0x00000001] process the image on OK. You should pass a valid bitmap in the pBitmap field of this structure.
	DLG_WINDOWLEVEL_SHOW_CONTEXTHELP	[0x00000002] dialog should contain context sensitive help icon.
	DLG_WINDOWLEVEL_SHOW_PREVIEW	[0x00000004] show preview of the image in the dialog. You should pass a valid bitmap in the pBitmap field of this structure.
	DLG_WINDOWLEVEL_SHOW_TOOL_ZOOMLEVEL	[0x00000008] show the "Zoom to fit" and "Zoom Normal" toolbar buttons. The DLG_HUE_SHOW_PREVIEW flag must be set in order to show these buttons.
	DLG_WINDOWLEVEL_SHOW_RANGE	[0x00000010] show the Range combo in the dialog.
pfnHelpCallback	Ignored.
pHelpCallBackUserData	Ignored.