Code:
#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 ("Connect") ;
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 ("Program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}
hwnd = CreateWindow (szAppName, TEXT ("Connect-the-Points Mouse Demo"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL) ;
ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;
while (GetMessage (&msg, NULL, 0, 0)>0)
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return (int)msg.wParam ;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static int iCount,iPrevX,iPrevY;
HDC hdc, hdcMem;
static HBITMAP hBitmap ;
PAINTSTRUCT ps;
BITMAP bitmap ;
switch(message)
{
case WM_LBUTTONDOWN:
iCount=0;
iPrevX=LOWORD(lParam);
iPrevY=HIWORD(lParam);
return 0;
case WM_LBUTTONUP:
InvalidateRect (hwnd, NULL, FALSE) ;
return 0 ;
case WM_MOUSEMOVE:
if(wParam & MK_LBUTTON)
{
hdc=GetDC(hwnd);
MoveToEx(hdc,iPrevX,iPrevY,NULL);
LineTo(hdc,LOWORD (lParam), HIWORD (lParam));
iPrevX=LOWORD (lParam);
iPrevY=HIWORD (lParam);
ReleaseDC(hwnd,hdc);
}
return 0;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
GetObject (hBitmap, sizeof (BITMAP), &bitmap) ;
hdcMem = CreateCompatibleDC (hdc);
SelectObject (hdcMem, hBitmap);
BitBlt(hdcMem,
0,0,
bitmap.bmWidth, bitmap.bmHeight,
hdc,
0,0,
SRCCOPY);
DeleteDC (hdcMem) ;
EndPaint (hwnd, &ps) ;
return 0;
case WM_DESTROY:
DeleteObject (hBitmap);
PostQuitMessage (0);
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
If you can modify this code it would help me a lot, I think I'm on the right track, but still...