vb 點選控制項移動窗體

新增模組  **如下：

public declare function sendmessage lib "user32" alias "sendmessagea" (byval hwnd as long, byval wmsg as long, byval wparam as long, lparam as any) as long
public declare function releasecapture lib "user32" () as long
public sub dodrag(theform as form)
if theform.windowstate <> vbmaximized then
releasecapture
sendmessage theform.hwnd, &ha1, 2, 0&
end if
end sub
在該控制項的方法呼叫：
private sub label1_mousedown(button as integer, shift as integer, x as single, y as single)
dodrag me
end sub

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