[转载]无边框对话框改变大小

实现效果需要处理以下这三个消息:

WM_NCHITTEST WM_SETCURSOR WM_NCLBUTTONDOWN

消息处理函数:

 

UINT CXXXDlg::OnNcHitTest(UINT nHitTest, CPoint point) { CRect rect; GetWindowRect(&rect); if(point.x <= rect.left+3) return HTLEFT; else if(point.x >= rect.right-3) return HTRIGHT; else if(point.y <= rect.top+3) return HTTOP; else if(point.y >= rect.bottom-3) return HTBOTTOM; else if(point.x <= rect.left+10 && point.y <= rect.top+10) return HTTOPLEFT; else if(point.x >= rect.right-10 && point.y <= rect.top+10) return HTTOPRIGHT; else if(point.x <= rect.left+10 && point.y >= rect.bottom-10) return HTBOTTOMLEFT; else if(point.x >= rect.right-10 && point.y >= rect.bottom-10) return HTBOTTOMRIGHT; return 0; } BOOL CXXXDlg::OnSetCursor(HWND hWnd, UINT nHitTest, UINT message) { if(nHitTest == HTCAPTION || nHitTest == HTSYSMENU || nHitTest == HTMENU || nHitTest == HTCLIENT) { SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_ARROW))); } else if(nHitTest == HTTOP || nHitTest == HTBOTTOM) { SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENS))); } else if(nHitTest == HTLEFT || nHitTest == HTRIGHT) { SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZEWE))); } else if(nHitTest == HTTOPLEFT || nHitTest == HTBOTTOMRIGHT) { SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENWSE))); } else if(nHitTest == HTTOPRIGHT || nHitTest == HTBOTTOMLEFT) { SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENESW))); } else { SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_ARROW))); } } void CXXXDlg::OnNcLButtonDown(UINT nHitTest, CPoint point) { if(nHitTest == HTTOP) SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_TOP, MAKELPARAM(point.x, point.y)); else if(nHitTest == HTBOTTOM) SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOM, MAKELPARAM(point.x, point.y)); else if(nHitTest == HTLEFT) SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_LEFT, MAKELPARAM(point.x, point.y)); else if(nHitTest == HTRIGHT) SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_RIGHT, MAKELPARAM(point.x, point.y)); else if(nHitTest == HTTOPLEFT) SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_TOPLEFT, MAKELPARAM(point.x, point.y)); else if(nHitTest == HTTOPRIGHT) SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_TOPRIGHT, MAKELPARAM(point.x, point.y)); else if(nHitTest == HTBOTTOMLEFT) SendMessage( WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOMLEFT, MAKELPARAM(point.x, point.y)); else if(nHitTest == HTBOTTOMRIGHT) SendMessage(WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOMRIGHT, MAKELPARAM(point.x, point.y)); }