DS_CENTER is the style attribute of dialog resource to center the dialog box in the working area of the monitor that contains the owner window. If no owner window is specified, the dialog box is centered in the working area of a monitor determined by the system. The working area is the area not obscured by the taskbar or any appbars. Below example shows this attribute in a static resource file however this style parameter can be used in runtime with CreateWindow() call.
///////////////////////////////////////////////////////////////////////////// // // Dialog.rc // IDD_DLGCENTER_DIALOG DIALOGEX 100, 100, 265, 200 STYLE DS_SETFONT | DS_FIXEDSYS | DS_CENTER | WS_POPUP | WS_VISIBLE | WS_CAPTION \ | WS_SYSMENU | WS_THICKFRAME EXSTYLE WS_EX_APPWINDOW CAPTION "MFC Dialog in Middle of Screen" FONT 8, "MS Shell Dlg", 0, 0, 0x1 BEGIN DEFPUSHBUTTON "OK",IDOK,152,179,50,14 PUSHBUTTON "Cancel",IDCANCEL,208,179,50,14 CTEXT "Center of desktop",IDC_STATIC,8,96,250,8 END
Using SetWindowPos function
A dialog or top level window can be centered in the desktop using SetWindowPos. We use the position parameters to do this operation. However SetWindowPos can be used to change size and layer of ordering also.
SetWindowPos functionChanges the size, position, and Z order of a child, pop-up, or top-level window. These windows are ordered according to their appearance on the screen. The topmost window receives the highest rank and is the first window in the Z order.
BOOL WINAPI SetWindowPos( _In_ HWND hWnd, _In_opt_ HWND hWndInsertAfter, _In_ int X, _In_ int Y, _In_ int cx, _In_ int cy, _In_ UINT uFlags );
Application using SetWindowPos
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