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/*------------------------------------------------------------ HELLOWIN.C -- Displays "Hello, Windows 98!" in client area (c) Charles Petzold, 1998 ------------------------------------------------------------*/ #include <windows.h> LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) { static TCHAR szAppName[] = TEXT ("Mouse Position Tips") ; HWND hwnd ; MSG msg ; WNDCLASS wndclass ; wndclass.style = CS_HREDRAW | CS_VREDRAW ; wndclass.lpfnWndProc = WndProc ; wndclass.cbClsExtra = 0 ; wndclass.cbWndExtra = 0 ; wndclass.hInstance = hInstance ; wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ; wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ; wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ; wndclass.lpszMenuName = NULL ; wndclass.lpszClassName = szAppName ; if (!RegisterClass (&wndclass)) { MessageBox (NULL, TEXT ("This program requires Windows NT!"), szAppName, MB_ICONERROR) ; return 0 ; } hwnd = CreateWindow (szAppName, // window class name TEXT ("Mouse Position Tips"), // window caption WS_OVERLAPPEDWINDOW, // window style CW_USEDEFAULT, // initial x position CW_USEDEFAULT, // initial y position CW_USEDEFAULT, // initial x size CW_USEDEFAULT, // initial y size NULL, // parent window handle NULL, // window menu handle hInstance, // program instance handle NULL) ; // creation parameters ShowWindow (hwnd, iCmdShow) ; UpdateWindow (hwnd) ; while (GetMessage (&msg, NULL, 0, 0)) { TranslateMessage (&msg) ; DispatchMessage (&msg) ; } return msg.wParam ; } LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { HDC hdc ; POINT pt,ptToDraw; RECT rect; char szBuffer[10]; static POINT ptPrevious={0,0}; static int iTextLength; static BOOL bIsTipExist=FALSE; switch (message) { case WM_MOUSEMOVE: SetTimer(hwnd,1,1000,NULL); //Erase Previous Mouse Tips if(bIsTipExist) { bIsTipExist=FALSE; hdc=GetDC(hwnd); SelectObject(hdc,GetStockObject(WHITE_PEN)); Rectangle(hdc,ptPrevious.x,ptPrevious.y-18,ptPrevious.x+iTextLength*8-2,ptPrevious.y+1); DeleteObject(SelectObject(hdc,GetStockObject(BLACK_PEN))); ReleaseDC(hwnd,hdc); } return 0; case WM_TIMER: bIsTipExist=TRUE; hdc=GetDC(hwnd); SelectObject(hdc,CreateSolidBrush(RGB(255,255,192))); //Get Current Mouse Position GetCursorPos(&pt); ScreenToClient(hwnd,&pt); //Decide where to draw GetClientRect(hwnd,&rect); iTextLength=sprintf(szBuffer,"%d,%d",pt.x,pt.y); ptToDraw=pt; if(pt.y-18<0) { ptToDraw.y+=18; ptToDraw.x-=iTextLength*8-2; if(ptToDraw.x<0) ptToDraw.x+=iTextLength*8+10; } else if(pt.x+iTextLength*8-2>rect.right) ptToDraw.x-=iTextLength*8-2; //Draw Rectangle Rectangle(hdc,ptToDraw.x,ptToDraw.y-18,ptToDraw.x+iTextLength*8-2,ptToDraw.y+1); //Draw Text SetTextAlign(hdc,TA_BOTTOM|TA_LEFT); SetBkMode(hdc,TRANSPARENT); TextOut(hdc,ptToDraw.x+1,ptToDraw.y,szBuffer,iTextLength); ptPrevious=ptToDraw; //Kill Timer and Delete GDI Objects KillTimer(hwnd,1); DeleteObject(SelectObject(hdc,GetStockObject(WHITE_BRUSH))); ReleaseDC(hwnd,hdc); return 0; case WM_DESTROY: PostQuitMessage (0) ; return 0 ; } return DefWindowProc (hwnd, message, wParam, lParam) ; }