So if you are not using an owner-drawn control, why are you having to draw anything selection-related? That is handled by the control itself. "A good athlete is the result of a good and worthy opponent." - David Crow "To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Thanks for your help. I think it was useful and I'll try it. And, I also made one mistake: I used OWN_DC style for my window(I feel shame for it). I guess that's why I usually got incorrect clipping rectangles, since they were already rounded by windows.

the messages tell u the specific module is being loaded, no symbol file means u couldn't switch in that module's code, and debug step by step. life is like a box of chocolate,you never know what you r going to get.

I read "Daniel Bowen, Creating a new MDI child: maximization and focus issues" and got some idea. I should handle redraw and focus issues. Set the client window as MDIS_ALLCHILDSTYLES style and change the function to : HWND child_createWnd(HWND hwndClient, int x, int y, int w, int h, TCHAR szCaption[], TCHAR szFilename[]) { HWND hwndChild ; MDICREATESTRUCT mdicreate ; int fMax = 0; if(!childClass) childClass = zw\_child\_registerClass(); mdicreate.szClass = szChildClass ; mdicreate.szTitle = szCaption ; mdicreate.hOwner = GetModuleHandle(0) ; mdicreate.x = CW\_USEDEFAULT ; mdicreate.y = CW\_USEDEFAULT ; mdicreate.cx = CW\_USEDEFAULT ; mdicreate.cy = CW\_USEDEFAULT ; mdicreate.style = `WS_OVERLAPPEDWINDOW | WS_CHILD | WS_CLIPSIBLINGS | WS_VSCROLL | WS_HSCROLL;` mdicreate.lParam = (LPARAM)szFilename ; `SendMessage(hwndClient, WM_SETREDRAW, FALSE, 0); /* Disable redraw */` hwndChild = (HWND) SendMessage (hwndClient, WM\_MDICREATE, 0, (LPARAM) (LPMDICREATESTRUCT) &mdicreate) ; `/* Should maximize? */ SendMessage(hwndClient, WM_MDIGETACTIVE, 0, &fMax); fMax? ShowWindow(hwndChild, SW_MAXIMIZE) : ShowWindow(hwndChild, SW_NORMAL); /* Handle focus here */ SetFocus(hwndChild); /* Enable and redraw */ SendMessage(hwndClient, WM_SETREDRAW, TRUE, 0); RedrawWindow(hwndClient, NULL, NULL, RDW_INVALIDATE | RDW_ALLCHILDREN);` return hwndChild; Right now everything is correct except very slow. If you have better idea, please let me know, thanks.

class A { int x; }; class B { template<class T> void temp(T* = NULL){} void test(void); }; void B::test(void) { temp<A>(); }; Still doesn't work. :(