Win32 SDK程序中拖动Thin边框窗口来改变窗口大小

来源：互联网发布：linux查看硬盘信息编辑：程序博客网时间：2024/05/16 04:08

主要需要添加处理WM_NCHITTEST，WM_SETCURSOR和WM_NCLBUTTONDOWN消息

版本1.0（本版本有问题，右下角不响应消息）

case WM_NCHITTEST:            POINT point;            point.x = LOWORD(lParam);            point.y = HIWORD(lParam);            RECT rect;                    GetWindowRect(hWnd,&rect);            if(point.x <= rect.left+5)            {                 return HTLEFT;            }            else if(point.x >= rect.right-5)            {                return HTRIGHT;            }            else if(point.y <= rect.top+5)            {                    return HTTOP;            }            else if(point.y >= rect.bottom-5)            {                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 ::DefWindowProc(hWnd, message, wParam, lParam);        case WM_SETCURSOR:            {                UINT nHitTest = LOWORD(lParam);                switch(nHitTest)                {                case HTTOP:                case HTBOTTOM:                    SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENS)));                    break;                case HTLEFT:                case HTRIGHT:                    SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZEWE)));                    break;                case HTTOPLEFT:                case HTBOTTOMRIGHT:                    SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENWSE)));                    break;                case HTTOPRIGHT:                case HTBOTTOMLEFT:                    SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENESW)));                    break;                case HTCAPTION:                case HTSYSMENU:                case HTMENU:                case HTCLIENT:                default:                    SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_ARROW)));                    break;                }            }            return TRUE;        case WM_NCLBUTTONDOWN:            switch(wParam)            {            case HTTOP:                SendMessage(hWnd, WM_SYSCOMMAND, SC_SIZE | WMSZ_TOP, lParam);                break;            case HTBOTTOM:                SendMessage(hWnd, WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOM, lParam);                break;            case HTLEFT:                SendMessage(hWnd, WM_SYSCOMMAND, SC_SIZE | WMSZ_LEFT, lParam);                break;            case HTRIGHT:                SendMessage(hWnd, WM_SYSCOMMAND, SC_SIZE | WMSZ_RIGHT, lParam);                break;            case HTTOPLEFT:                SendMessage(hWnd, WM_SYSCOMMAND, SC_SIZE | WMSZ_TOPLEFT, lParam);                break;            case HTTOPRIGHT:                SendMessage(hWnd, WM_SYSCOMMAND, SC_SIZE | WMSZ_TOPRIGHT, lParam);                break;            case HTBOTTOMLEFT:                SendMessage(hWnd, WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOMLEFT, lParam);                break;            case HTBOTTOMRIGHT:                SendMessage(hWnd, WM_SYSCOMMAND, SC_SIZE | WMSZ_BOTTOMRIGHT, lParam);                break;            default:                break;            }            return DefWindowProc(hWnd, message, wParam, lParam);

版本2.0（修正版本1.0的问题）

switch (message){case WM_NCHITTEST:POINT point;point.x = LOWORD(lParam);point.y = HIWORD(lParam);RECT rect;        GetWindowRect(&rect);if(point.x <= rect.left+5){return HTLEFT;}else if(point.x >= rect.right-5 && point.y < rect.bottom-10){return HTRIGHT;}else if(point.y <= rect.top+5){    return HTTOP;}else if(point.y >= rect.bottom-5&& point.x < rect.right-10){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;}case WM_SETCURSOR:{UINT nHitTest = LOWORD(lParam);switch(nHitTest){case HTTOP:case HTBOTTOM:SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENS)));break;case HTLEFT:case HTRIGHT:SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZEWE)));break;case HTTOPLEFT:case HTBOTTOMRIGHT:SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENWSE)));break;case HTTOPRIGHT:case HTBOTTOMLEFT:SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_SIZENESW)));break;case HTCAPTION:case HTSYSMENU:case HTMENU:case HTCLIENT:default:SetCursor(LoadCursor(NULL, MAKEINTRESOURCE(IDC_ARROW)));break;}}return TRUE;