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DwmExtendFrameIntoClientArea.md

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Function name : DwmExtendFrameIntoClientArea

Group: Desktop Window Manager (DWM) - Library: dwmapi

Extends the window frame behind the client area.

Code examples:

Customizing the frame of top-level form: removing the standard frame (VFP9, Vista)

Declaration:

DECLARE INTEGER DwmExtendFrameIntoClientArea IN Dwmapi;
	INTEGER hWindow,;
	STRING @pMarInset

FoxPro declaration:

HRESULT WINAPI DwmExtendFrameIntoClientArea(
        HWND hWnd,
  __in  const MARGINS *pMarInset
);

Parameters:

hWnd The handle to the window in which the frame will be extended into the client area.

pMarInset [in] A pointer to a MARGINS structure that describes the margins to use when extending the frame into the client area.

Return value:

If the method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Comments:

Minimum supported client: Windows Vista.
Note: works for top-level forms only (ShowWindow=2).

This function is used to extend the application frame into the client area. With some extra work, controls can be integrated into the extra space on the frame.

A transparent form is created by calling this function with all negative margins.