ShowHistoContrastDlg method (ILEADRasterDlgClr)

Syntax	short ShowHistoContrastDlg (long hWnd);
Overview	Refer to Using Imaging Common Dialogs

Remarks

Displays the HistoContrast dialog box, and gets the options for the HistoContrast method.

The layout and action of the dialog depends on the flags set in the UIFlags property. Possible options are:

Value	Meaning
HISTOCONTRAST_AUTOPROCESS	[0x00000001] process the image on OK. The Common Dialog Bitmap property must be assigned a valid bitmap before calling this method.
HISTOCONTRAST_SHOW_CONTEXTHELP	[0x00000002] dialog should contain a context sensitive help icon.
HISTOCONTRAST_SHOW_PREVIEW	[0x00000004] show a preview of the image in the dialog. The Common Dialog Bitmap property must be assigned a valid bitmap before calling this method.
HISTOCONTRAST_SHOW_TOOL_ZOOMLEVEL	[0x00000008] show the "Zoom to fit" and "Zoom Normal" toolbar buttons. The HISTOCONTRAST_SHOW_PREVIEW flag must be set in order to show these buttons.

If you include HISTOCONTRAST_AUTOPROCESS or HISTOCONTRAST_SHOW_PREVIEW in the UIFlags property, the Common Dialog Bitmap property must be assigned a valid bitmap before calling this method.

The following property is associated with this dialog: the Change property.

To include a Help button in the dialog, set the ShowHelpButton property to VARIANT_TRUE.

The HistoContrast dialog can be seen below:

$image\HistoContrast.gif$