ShowDisplayGammaDlg Method

Description:

Shows the Display: Contrast, Brightness and Gamma dialog. The Display: Contrast, Brightness and Gamma dialog is as follows:

The sliders and drop-down list on the left side of the dialog are used to set the brightness, contrast and gamma-correction parameters for the display of the image. The settings can be applied to a single (red, green or blue) channel, or to all 3 channels, simultaneously. The graph at the top of the dialog shows the intensity transform function as defined by the brightness, contrast and gamma-correction settings.

The user can click the "Preview Changes" checkbox to see the effects of the brightness, contrast and gamma-correction parameters in the preview area (they can leave the checkbox un-checked if the image is particularly large and therefore takes a long time to render).

Clicking the "OK" button will apply the brightness, contrast and gamma-correction parameters to the image referenced by thePageDisplay, and then close the dialog. Note that you must specify the hWnd parameter in order for the end-user to see any changes when they click "OK".

Clicking the "Apply" button will apply the brightness, contrast and gamma-correction parameters to the image referenced by thePageDisplay, but leave the dialog on the screen. Note that you must specify the hWnd parameter in order for the end-user to see any changes when they click "Apply".

Clicking the "Cancel" button will close the dialog without making any changes.

Syntax:

      ShowDisplayGammaDlg (thePageDisplay As IGPageDisplay, hWnd As
Long)

Parameters:

thePageDisplay	Provide the IGPageDisplay Object that your program is using to handle display functions for your image.
hWnd	If your image is presented via IGPageViewCtl Control, then specify IGPageViewCtln.hWnd.

Return Value:

None

Bits Per Pixel:

N/A

Sample:

ig_guidlg.vb6.exe