ShowEdgeDetectorDlg method (ILEADRasterDlgImgEfx)

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

Remarks

Displays the Edge Detector dialog box, and gets the options for the EdgeDetector method.

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

Value	Meaning
EDGEDETECTOR_AUTOPROCESS	[0X00000001] process the image on OK. The Common Dialog Bitmap property must be assigned a valid bitmap before calling this method.
EDGEDETECTOR_SHOW_CONTEXTHELP	[0X00000002] dialog should contain a context sensitive help icon.
EDGEDETECTOR_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.
EDGEDETECTOR_SHOW_TOOL_ZOOMLEVEL	[0X00000008] show the "Zoom to fit" and "Zoom Normal" toolbar buttons. The EDGEDETECTOR_SHOW_PREVIEW flag must be set in order to show these buttons.

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

The properties associated with this dialog box are:

Threshold property

EdgeDetectionFilterType property

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

The Edge Detector dialog can be seen below:

$image\EdgeDetector.gif$