How to make my win32 app show right mouse clicks - c++

Question

This is what i Have so far.
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps);
GetClientRect (hwnd, &rect);
GetWindowRect(hwnd, &size);
width = size.right - size.left;
itoa(width, Swidth, 10);
height = size.bottom - size.top;
itoa(height, Sheight, 10);
itoa(rect.bottom, sBottom, 10);
itoa(rect.top, sTop, 10);
itoa(rect.left, sLeft, 10);
itoa(rect.right, sRight, 10);
TextOut(hdc, 0, 0, "Here is my width: ", 18);
TextOut(hdc, 125, 0, Swidth, 5);
TextOut(hdc, 175, 0, "Here is my height: ", 18);
TextOut(hdc, 300, 0, Sheight, 4);
TextOut(hdc, 0, 20, sBottom, strlen(sBottom));
TextOut(hdc, 50, 20, sTop, strlen(sTop));
TextOut(hdc, 100, 20, sRight, strlen(sRight));
TextOut(hdc, 150, 20, sLeft, strlen(sLeft));
TextOut(hdc, 0, 40, "Right Button Clicked: ", 23);
itoa(rightButtonClicked, SrightButtonClicked, 10);
TextOut(hdc, 150, 40, SrightButtonClicked, strlen(SrightButtonClicked));
if(rightButtonClicked > 20)
TextOut(hdc, 0, 60, SrightButtonClicked, strlen(SrightButtonClicked));
EndPaint (hwnd, &ps);
return 0;
case WM_LBUTTONDOWN:
return 0;
case WM_RBUTTONDOWN:
rightButtonClicked++;
return 0
Now I'm not sure what I"m doing wrong but I'm supposed to make it output the number of times I right click within the windows. The counter I have for rightButtonClicked incremetns but it won't display properly. Yes this is homework and I have researched the topic quite a bit so I'm looking for a little help.