Programm startet, aber zeigt keinen Anwendungsbereich an

[SirLant]

Habe folgendes Listing aus dem Petzold abgeschrieben, aber irgendwo hab ich nen
kleinen Fehler eingebaut, das Programm startet, aber es zeigt kein Fenster an

/* sysmets2.c - Ermittlung der Maße des System Version 2 */
#include <windows.h>
#include "sysmets.h"
#define UNICODE
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain (
				HINSTANCE hInstance,
				HINSTANCE hPrevInstance,
				PSTR szCmdLine, int iCmdShow
					) {

	static TCHAR AppName[] = TEXT ("SystemMetrics2");
	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 = AppName;

	if (!RegisterClass (&wndclass)) {
		MessageBox (
				NULL,
				TEXT ("Programm arbeitet mit UNICODE"),
				AppName,
				MB_ICONERROR
					);
		return 0;
	}

	hwnd = CreateWindow (
					AppName,
					TEXT ("Metrics des System V2"),
					WS_OVERLAPPEDWINDOW | WS_VSCROLL,
					CW_USEDEFAULT,
					CW_USEDEFAULT,
					CW_USEDEFAULT,
					CW_USEDEFAULT,
					NULL,
					NULL,
					hInstance,
					NULL
						);

	UpdateWindow (hwnd);

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

	return msg.wParam;

}

LRESULT CALLBACK WndProc (
					HWND hwnd,
					UINT message,
					WPARAM wParam,
					LPARAM lParam
						  ) {

	static int cxChar, cxCaps, cyChar, cyClient, iVScrollPos;
	HDC hdc;
	int i,y;
	PAINTSTRUCT ps;
	TCHAR Buffer[10];
	TEXTMETRIC tm;

	switch (message) {

		case WM_CREATE:
			hdc = GetDC (hwnd);

			GetTextMetrics (hdc, &tm);
			cxChar = tm.tmAveCharWidth;
			cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar/2;
			cyChar = tm.tmHeight + tm.tmExternalLeading;

			ReleaseDC (hwnd, hdc);

			SetScrollRange (hwnd, SB_VERT, 0, NUMLINES-1, FALSE);
			SetScrollPos (hwnd, SB_VERT, iVScrollPos, TRUE);

			return 0;

		case WM_SIZE:
			cyClient = HIWORD (lParam);
			return 0;

		case WM_VSCROLL:

			switch (LOWORD (wParam)) {

				case SB_LINEUP:
					iVScrollPos -= 1;
					break;

				case SB_LINEDOWN:
					iVScrollPos += 1;
					break;

				case SB_PAGEUP:
					iVScrollPos -= cyClient / cyChar;
					break;

				case SB_PAGEDOWN:
					iVScrollPos += cyClient / cyChar;
					break;

				case SB_THUMBPOSITION:
					iVScrollPos = HIWORD (wParam);
					break;

				default:
					break;
			}

			iVScrollPos = max (0, min (iVScrollPos, NUMLINES -1));

			if (iVScrollPos != GetScrollPos (hwnd, SB_VERT)) {
				SetScrollPos (hwnd, SB_VERT, iVScrollPos, TRUE);
				InvalidateRect (hwnd, NULL, TRUE);
			}

			return 0;

		case WM_PAINT:
			hdc = BeginPaint (hwnd, &ps);

			for (i = 0; i < NUMLINES; i++) {
				y = cyChar * (i - iVScrollPos);

				TextOut (
					hdc,
					0,
					y,
					sysmetrics[i].szLabel,
					lstrlen (sysmetrics[i].szLabel)
						);
				TextOut (
					hdc,
					22 * cxCaps,
					y,
					sysmetrics[i].szDesc,
					lstrlen (sysmetrics[i].szDesc)
						);
				SetTextAlign (hdc, TA_RIGHT | TA_TOP);
				TextOut (
					hdc,
					22 * cxCaps + 55 * cxChar,
					y,
					Buffer,
					wsprintf (
						Buffer,
						TEXT ("%5d"),
						GetSystemMetrics (sysmetrics[i].iIndex)
							 )
						);

				SetTextAlign (hdc, TA_LEFT | TA_TOP);

			}
			EndPaint (hwnd, &ps);
			return 0;

		case WM_DESTROY:
			MessageBox (hwnd,TEXT ("Quit"), TEXT ("Quit"), 0);
			PostQuitMessage (0);
			return 0;

	}

	return DefWindowProc (hwnd, message, wParam, lParam);

}

[Hepi]

Du hast folgende Zeile vergessen, mit abzutippen:

ShowWindow(hwnd, iCmdShow); // <-- die hier! 
UpdateWindow (hwnd); 
while (GetMessage (&msg, NULL, 0, 0)) {

[SirLant]

Die stand da mal, muss beim Fehler finden wo irgendwie gelöscht worden sein.
Danke