Dlaczego prosty program zajmuje 97% czasu procesora?

Mam taki problem - kod jest banalny - oprocz wyswietlenia okienka nie robi kompletnie nic. A jednak - zajętość procesora nie schodzi poniżej 97%. Dlaczego tak jest i co zrobic, zeby tak nie bylo?

#include <windows.h>

// Global event handle. This event is set when we the main window thread
// wants to finish its existence
HANDLE hGlobalEvent; 



LRESULT CALLBACK WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
        switch(Msg)
        {
                
                // message send when we want to close the window
                case WM_DESTROY:
                {
                        PostQuitMessage(0);
                        break;
                }
                
                // default window procedure
                default:
                        return DefWindowProc(hWnd, Msg, wParam, lParam);
        }
        
        return 0L;
}




DWORD WINAPI mainWindowThread(LPVOID lpParameter)
{
        HINSTANCE hInstance = *((HINSTANCE*)(lpParameter));
        // define the new window class structure
        WNDCLASSEX wc;
        
        wc.cbSize                       = sizeof(WNDCLASSEX);
    wc.style                    = CS_VREDRAW | CS_HREDRAW;
    wc.lpfnWndProc              = WndProc;
    wc.cbClsExtra               = 0;
    wc.cbWndExtra               = 0;
    wc.hInstance                = hInstance;
    wc.hIcon                    = NULL;
    wc.hCursor                  = (HCURSOR)LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground    = (HBRUSH)GetSysColorBrush(COLOR_3DFACE);
    wc.lpszMenuName             = NULL;
    wc.lpszClassName    = "MAIN_WINDOW";
    wc.hIconSm                  = NULL;
        
        // register new window class
        if(!RegisterClassEx(&wc))
                return 1;

        // create main window program based on the previously registered window class
        HWND hWnd = CreateWindowEx( NULL, "MAIN_WINDOW", "main_window", WS_OVERLAPPEDWINDOW,
                                                                50, 50, 800, 600, NULL, NULL, hInstance, NULL);
        // show the window                                                      
        ShowWindow(hWnd, SW_NORMAL);
        
        
        // message loop
        MSG message;
        while(true)
        {
                if( PeekMessage(&message, NULL, 0, 0, PM_REMOVE) )
                {
                        if(message.message == WM_QUIT)
                                break;
                        
                        TranslateMessage(&message);
                        DispatchMessage(&message);
                }
        }
        
        SetEvent(hGlobalEvent);
        
        return message.wParam;
}





int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
        // we have to synchronize the main window thread with the main program thread,
        // meaning that until the main window thread doesn't exit, the main program
        // thread doesn't exit as well...
        
        // create a synchronizing event with initial state set to false
        hGlobalEvent = CreateEvent(NULL, true, false, "MAIN_WINDOW_THREAD_EVENT");
        
        // create a thread for the main window
        DWORD ThreadID;
        HANDLE hThread = CreateThread(NULL, 0, mainWindowThread, &hInstance, 0, &ThreadID);
        
        // wait until the state of the synchronizing event is set to true
        if( WaitForMultipleObjects(1, &hGlobalEvent, true, INFINITE) != WAIT_OBJECT_0 )
                MessageBox(NULL, "Synchronization error", "Error", MB_OK);
        
        // close the main window thread handle
        CloseHandle(hThread);

}

Z gory dzieki za pomoc

Ponieważ używasz PeekMessage() co powoduje jedynie "zajrzenie" do kolejki komunikatów windows obadanie czy nic tam nie leży i oddanie sterowania do programu, a że masz to pięknie zrobione w pętli while(true) no to wykonuje to tak szybko jak tylko potrafi, polecam użycia

while(GetMessage(&message, NULL, 0, 0) )
{
	TranslateMessage(&message);
	DispatchMessage(&message);
}

(no chyba że tam jeszcze będziesz chciał coś dodać co spowolni działanie programu)

pozdrawiam