Posting Code/Help with Mouse Move
Author
I was trying to make a program that everytime the mouse was moved and if it was in a positive coordinate that it would draw a rectangle where the mouse was. Just sort of fooling around with a snipet of code I wanted to use later. Here is my code, I cant figure out why it wont draw at all or even stop at a breakpoint in the procedure. Also how do you post code in those little boxes? Code:
case WM_MOUSEMOVE:
{
hDC = BeginPaint( g_hWndMain, &PaintStruct );
int xPos;
int yPos;
xPos = LOWORD(lParam);
yPos = HIWORD(lParam);
Rectangle(hDC, xPos, yPos, xPos + 20, yPos + 20);
if( xPos > 0 && yPos > 0)
Rectangle(hDC, xPos, yPos, xPos + 20, yPos + 20);
EndPaint( g_hWndMain, &PaintStruct );
return 0;
}
I''m not sure but I think the values returned would be the amount moved since last time so try
// Global
int xPos;
int yPos;
// Local
xPos + = LOWORD(lParam);
yPos + = HIWORD(lParam);
// Global
int xPos;
int yPos;
// Local
xPos + = LOWORD(lParam);
yPos + = HIWORD(lParam);
posting in a hurry, but it should help. I
to make the nice little code box put the word "source" in
open and close brackets
-----------------------------
"There are ones that say they can and there are those who actually do."
"...u can not learn programming in a class, you have to learn it on your own."
[edited by - cMADsc on March 31, 2003 3:28:23 PM]
LRESULT CALLBACK WndProc(.....);{ POINT point;case WM_MOUSEMOVE:hdc = GetDC(hwnd);GetCursorPos(&point)ScreenToClient(hwnd, &point);Rectangle(hdc, point.x, point.y, point.x+20, point.y+20);ClientToScreen(hwnd, &point);ReleaseDC(hwnd,hdc);return 0;case WM_PAINT:hdc = BeginPaint(hwnd, &ps) . . . EndPaint(hwnd, &ps);return 0; to make the nice little code box put the word "source" in
open and close brackets
-----------------------------
"There are ones that say they can and there are those who actually do."
"...u can not learn programming in a class, you have to learn it on your own."
[edited by - cMADsc on March 31, 2003 3:28:23 PM]
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