The GetNextWindow function retrieves a handle to the next or previous window in the Z-Order. The next window is below the specified window; the previous window is above. If the specified window is a topmost window, the function retrieves a handle to the next (or previous) topmost window. If the specified window is a top-level window, the function retrieves a handle to the next (or previous) top-level window. If the specified window is a child window, the function searches for a handle to the next (or previous) child window.

Retrieves a handle to the window (if any) that has captured the mouse. Only one window at a time can capture the mouse; this window receives mouse input whether or not the cursor is within its borders.

The return value is a handle to the capture window associated with the current thread. If no window in the thread has captured the mouse, the return value is null.

C# Signature:

[DllImport("user32.dll")]
static extern IntPtr GetCapture();

User-Defined Types:

None.

Notes:

A null return value means the current thread has not captured the mouse. However, it is possible that another thread or process has captured the mouse.

None.

To get a handle to the capture window on another thread, use the GetGUIThreadInfo function.

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