WinAPI: SetWindowPos - 改变窗口的位置与状态

//声明:

SetWindowPos(

  hWnd: HWND;            {窗口句柄}

  hWndInsertAfter: HWND; {窗口的 Z 顺序}

  X, Y: Integer;         {位置}

  cx, cy: Integer;       {大小}

  uFlags: UINT           {选项}

): BOOL;



//hWndInsertAfter 参数可选值:

HWND_TOP       = 0;        {在前面}

HWND_BOTTOM    = 1;        {在后面}

HWND_TOPMOST   = HWND(-1); {在前面, 位于任何顶部窗口的前面}

HWND_NOTOPMOST = HWND(-2); {在前面, 位于其他顶部窗口的后面}



//uFlags 参数可选值:

SWP_NOSIZE         = 1;    {忽略 cx、cy, 保持大小}

SWP_NOMOVE         = 2;    {忽略 X、Y, 不改变位置}

SWP_NOZORDER       = 4;    {忽略 hWndInsertAfter, 保持 Z 顺序}

SWP_NOREDRAW       = 8;    {不重绘}

SWP_NOACTIVATE     = $10;  {不激活}

SWP_FRAMECHANGED   = $20;  {强制发送 WM_NCCALCSIZE 消息, 一般只是在改变大小时才发送此消息}

SWP_SHOWWINDOW     = $40;  {显示窗口}

SWP_HIDEWINDOW     = $80;  {隐藏窗口}

SWP_NOCOPYBITS     = $100; {丢弃客户区}

SWP_NOOWNERZORDER  = $200; {忽略 hWndInsertAfter, 不改变 Z 序列的所有者}

SWP_NOSENDCHANGING = $400; {不发出 WM_WINDOWPOSCHANGING 消息}

SWP_DRAWFRAME      = SWP_FRAMECHANGED; {画边框}

SWP_NOREPOSITION   = SWP_NOOWNERZORDER;{}

SWP_DEFERERASE     = $2000;            {防止产生 WM_SYNCPAINT 消息}

SWP_ASYNCWINDOWPOS = $4000;            {若调用进程不拥有窗口, 系统会向拥有窗口的线程发出需求}


 
   




//举例:

procedure TForm1.Button1Click(Sender: TObject);

begin

  SetWindowPos(Handle, HWND_TOPMOST, 0,0, 100,200, SWP_SHOWWINDOW);

end;