Semi-transparent Form -- Visual FoxPro : Using Win32 (WinAPI) Functions


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Semi-transparent Form

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Before you begin:

How to draw a custom Window Caption on FoxPro form

A way to make a transparent area in a form -- a hole in the form

Round FoxPro form

Transparent Menu on top-level form (requires VFP9)


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User rating: 7.5/10 (2 votes)

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3339 bytes
Created: 2004-07-08 15:19:54
Modified: 2011-01-29 06:43:29
Visits in 7 days: 113

Listed functions:

GetWindowLong
SetLayeredWindowAttributes
SetWindowLong

My comment:

Set ShowWindow property of the form to 2 (top-level form). In more accurate words, WS_EX_LAYERED extended style cannot be used for child windows, as stated in Window Features aticle on MSDN.

Hit testing of a layered window is based on the shape and transparency of the window. This means that the areas of the window that are color-keyed or whose alpha value is zero will let the mouse messages through.

However, if the layered window has the WS_EX_TRANSPARENT extended window style, the shape of the layered window will be ignored and the mouse events will be passed to other windows underneath the layered window.

See also:

Creating irregularly shaped FoxPro form using transparency color key

How to draw a custom Window Caption on FoxPro form

A way to make a transparent area in a form -- a hole in the form

Round FoxPro form

Transparent Menu on top-level form (requires VFP9)

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	User Contributed Notes:




	subhash.babu@gmail.com \| 2005-12-02 06:17:42


	While running this code, I got an error message HWND propery is not found. (THIS.HWND). Can you plz tell me the way to get FORM.HANDLE value. I am using VFP6 in WIN2K. Thanks



	A.M. \| 2005-12-02 07:47:18


	To obtain HWND of a Form, in VFP3..6 call GetFocus API. Make sure, this call is made after the form is activated. That means do not place it in INIT but in ACTIVATE code.




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