Method wnd.SetTransparency

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Overload

Sets window transparency attributes (opacity and/or transparent color).

public void SetTransparency(bool allowTransparency, int? opacity = null, ColorInt? colorKey = null, bool noException = false)

Parameters

allowTransparency  (bool) Set or remove WS_EX_LAYERED style that is required for transparency. If false, other parameters are not used.

opacity  (int?) Opacity from 0 (completely transparent) to 255 (opaque). Does not change if null. If less than 0 or greater than 255, makes 0 or 255.

colorKey  (ColorInt?) Make pixels of this color completely transparent. Does not change if null. The alpha byte is not used.

noException  (bool) Don't throw exception when fails.

Exceptions

AuWndException

Remarks

Uses API SetLayeredWindowAttributes. On Windows 7 works only with top-level windows, not with controls. Fails with WPF windows (class name starts with "HwndWrapper").