Program to implement mouse coordinate in vc plus plus?

Answer 1

Start by creating a non-empty WIN32 application.

In your main source, include the standard I/O library:

#include

In the global variables section of your main source, add the following class declaration and object:

struct point

{

int x;

int y;

point():x(0),y(0){}

TCHAR* get() const

{

static TCHAR str[MAX_LOADSTRING];

_stprintf_s(str, MAX_LOADSTRING, "Mouse: %i,%i", x, y);

return(str);

}

};

point mouse_coordinate;

In your WndProc callback function, add the following message handler:

case WM_MOUSEMOVE:

mouse_coordinate.x=LOWORD(lParam);

mouse_coordinate.y=HIWORD(lParam);

RECT r;

GetClientRect(hWnd,&r);

InvalidateRect(hWnd,&r,TRUE);

break;

Finally, modify the WM_PAINT message handler as follows:

case WM_PAINT:

hdc = BeginPaint(hWnd, &ps);

// TODO: Add any drawing code here...

TextOut(hdc, 0, 0, mouse_coordinate.get(), _tcsnlen(mouse_coordinate.get(),MAX_LOADSTRING));

EndPaint(hWnd, &ps);

break;

Now run the application. The mouse coordinates will be printed at the top left of the client area.