lol, funniest acting program EVER -- and i need help with it :(

Ok, I have my program here that acts a bit funny. A ball is supposed to move across the screen. I am successful in that.

In my ball struct I have a function called Update. I don't think this is where the problem lies.

The problem is that it only updates while my MOUSE is MOVING!!!

I suspect it's got something to do with my main loop:

Code:

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        while(GetMessage(&Msg, hWnd, 0, 0) > 0)
        {
                TranslateMessage(&Msg);
                DispatchMessage(&Msg);

                MainFunc(hWnd);
        }

---

lol this is the funniest thing ever to me. I don't get why it only updates every time the mouse is moving. Here's my whole main.cpp (I really don't think there is a problem with any of my functions):

Code:

---

#include <windows.h>
#include "resource.h"
#include "ball.h"
#include "createmask.h"
#include "drawball.h"
#include <cstdio>

void MainFunc(HWND hWnd)
{
        HDC hDC = GetDC(hWnd);
        RECT rcClient;
        GetClientRect(hWnd, &rcClient);

        DrawBall(hWnd, &rcClient);

        //CheckWallHit(&rcClient);
        ball.Update();
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
        switch(Msg)
        {
        case WM_CREATE:
                {
                        BITMAP bm;
                        Ball = LoadBitmap(GetModuleHandle(NULL), MAKEINTRESOURCE(IDB_BALL));
                        Ballmask = CreateBitmapMask(Ball, RGB(255,0,255));
                        GetObject(Ball, sizeof(bm), &bm);

                        ball.width = bm.bmWidth;
                        ball.height= bm.bmHeight;
                        ball.dx = 1;
                        ball.dy = 1;
                        ball.lastx = 4;
                        ball.lasty = 4;
                        ball.x = 5;
                        ball.y = 5;
                        ball.speed = 1;
                }
                break;

        case WM_CLOSE:
                {
                        DestroyWindow(hWnd);
                }
                break;

        case WM_DESTROY:
                {
                        //Delete all variables
                        DeleteObject(Ball);
                        DeleteObject(Ballmask);
                        //DeleteDC(hDC);
                        PostQuitMessage(0);
                }
                break;

        case WM_PAINT:
                {
                        PAINTSTRUCT ps;
                        RECT rcClient;

                        HDC hDC = BeginPaint(hWnd, &ps);
                        GetClientRect(hWnd, &rcClient);

                        EndPaint(hWnd, &ps);
                }
                break;

        case WM_COMMAND:
                {
                        switch(wParam)
                        {
                        case ID_FILE_EXIT:
                                PostQuitMessage(0);
                                break;
                        }
                }
                break;

        default:
                {
                        return DefWindowProc(hWnd, Msg, wParam, lParam);
                }
                break;
        }
        return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
        WNDCLASSEX wc;
        MSG Msg;
        HWND hWnd;

        wc.cbClsExtra = 0;
        wc.cbSize = sizeof(WNDCLASSEX);
        wc.cbWndExtra = 0;
        wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
        wc.hCursor = LoadCursor(NULL, IDC_ARROW);
        wc.hIcon = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON));
        wc.hIconSm = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON));
        wc.hInstance = hInstance;
        wc.lpfnWndProc = WndProc;
        wc.lpszClassName = "Window Class";
        wc.lpszMenuName = MAKEINTRESOURCE(IDR_MYMENU);
        wc.style = 0;

        if(!RegisterClassEx(&wc))
        {
                MessageBox(NULL, "Windows registration failed!", "Error!", MB_ICONEXCLAMATION);
                return 0;
        }

        hWnd = CreateWindowEx( WS_EX_CLIENTEDGE, "Window Class", "Lee's Window", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 800, 600, NULL, NULL, hInstance, NULL);

        /*HWND hwndListBox;
      hwndListBox = CreateWindowEx(0, "LISTBOX", "", LBS_STANDARD |
                  WS_VISIBLE, 5, 5, 30, 50, hWnd, (HMENU)IDR_MYMENU,
          GetModuleHandle(NULL), NULL);*/

        if(hWnd == NULL)
        {
                MessageBox(NULL, "Window creation failed!", "Error!", MB_ICONEXCLAMATION);
                return 0;
        }

        ShowWindow(hWnd, nCmdShow);
        UpdateWindow(hWnd);

        while(GetMessage(&Msg, hWnd, 0, 0) > 0)
        {
                TranslateMessage(&Msg);
                DispatchMessage(&Msg);

                MainFunc(hWnd);
        }
        return 0;
}

---

GetMessage() pauses until a message is available, like your mouse movement. Try this instead:

Code:

---

bool app_done = FALSE;

while (!app_done) {
  if (PeekMessage(&Msg, hWnd, 0, 0, PM_REMOVE)) {
    if (Msg.message == WM_QUIT) { app_done = TRUE; }
    else {
      TranslateMessage(&Msg);
      DispatchMessage(&Msg);
    }
  }

  MainFunc(hWnd);
}

---