Win32 Api problém s oknami – C / C++ – Fórum – Programujte.com

Dobrý deň. Začínam pracovať s Win32 a pri štúdiu som narazil na problém. Vytvoril som si jednoduchý program:

#include <windows.h>



#include "resource.h" 



const char g_szClassName[] = "myWindowClass";



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

{

	switch(Message)

	{

               case WM_CREATE:

		{

			HMENU hMenu, hSubMenu;

			HICON hIcon, hIconSm;



			hMenu = CreateMenu();



			hSubMenu = CreatePopupMenu();

			AppendMenu(hSubMenu, MF_STRING, ID_FILE_EXIT, "Koniec");

			AppendMenu(hMenu, MF_STRING | MF_POPUP, (UINT)hSubMenu, "Súbor");



			hSubMenu = CreatePopupMenu();

			AppendMenu(hSubMenu, MF_STRING, ID_STUFF_GO, "Automatické vypnutie PC");

			AppendMenu(hSubMenu, MF_STRING, ID_STUFF_GO2, "Vzdialené vypnutie PC");

			AppendMenu(hSubMenu, MF_STRING, ID_STUFF_GO3, "Štruktúra zložiek");



            AppendMenu(hMenu, MF_STRING | MF_POPUP, (UINT)hSubMenu, "Menu");



			SetMenu(hwnd, hMenu);



			hIcon = LoadImage(NULL, "ikona.ico", IMAGE_ICON, 32, 32, LR_LOADFROMFILE);

			if(hIcon)

				SendMessage(hwnd, WM_SETICON, ICON_BIG, (LPARAM)hIcon);

			else

				MessageBox(hwnd, "Nemôžem načítať veľkú ikonu!", "Chyba", MB_OK | MB_ICONERROR);



			hIconSm = LoadImage(NULL, "ikona.ico", IMAGE_ICON, 16, 16, LR_LOADFROMFILE);

			if(hIconSm)

				SendMessage(hwnd, WM_SETICON, ICON_SMALL, (LPARAM)hIconSm);

			else

				MessageBox(hwnd, "Nemôžem načítať malú ikonu!", "Chyba", MB_OK | MB_ICONERROR);

		}

		break;

		case WM_COMMAND:

			switch(LOWORD(wParam))

			{

				case ID_FILE_EXIT:

					PostMessage(hwnd, WM_CLOSE, 0, 0);

				break;

				case ID_STUFF_GO:

					WinExec("cmd.exe /C shutdown -s -t 30", SW_SHOW);

				break;

				case ID_STUFF_GO2:

					WinExec("cmd.exe /C shutdown -i", SW_SHOW);

				break;

				case ID_STUFF_GO3:

					WinExec("cmd.exe /C tree", SW_SHOW);

				break;

			}

		break;

		case WM_CLOSE:

			DestroyWindow(hwnd);

		break;

		case WM_DESTROY:

			PostQuitMessage(0);

		break;

		default:

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

	}

	return 0;

}



int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,

	LPSTR lpCmdLine, int nCmdShow)

{

	WNDCLASSEX wc;

	HWND hwnd;

	MSG Msg;



	wc.cbSize		 = sizeof(WNDCLASSEX);

	wc.style		 = 0;

	wc.lpfnWndProc	 = WndProc;

	wc.cbClsExtra	 = 0;

	wc.cbWndExtra	 = 0;

	wc.hInstance	 = hInstance;

	wc.hIcon		 = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON));

	wc.hCursor		 = LoadCursor(NULL, IDC_ARROW);

	wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);

	wc.lpszMenuName  = MAKEINTRESOURCE(IDR_MYMENU);

	wc.lpszClassName = g_szClassName;

	wc.hIconSm		 = (HICON)LoadImage(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_MYICON), IMAGE_ICON, 16, 16, 0);



	if(!RegisterClassEx(&wc))

	{

		MessageBox(NULL, "Window Registration Failed!", "Error!",

			MB_ICONEXCLAMATION | MB_OK);

		return 0;

	}



	hwnd = CreateWindowEx(

		WS_EX_CLIENTEDGE,

		g_szClassName,

		"Projekt1", 

		WS_OVERLAPPEDWINDOW,

		CW_USEDEFAULT, CW_USEDEFAULT, 600, 400,

		NULL, NULL, hInstance, NULL);

	if(hwnd == NULL)

	{

		MessageBox(NULL, "Window Creation Failed!", "Error!",

			MB_ICONEXCLAMATION | MB_OK);

		return 0;

	}

	ShowWindow(hwnd, nCmdShow);

	UpdateWindow(hwnd);



	while(GetMessage(&Msg, NULL, 0, 0) > 0)

	{

		TranslateMessage(&Msg);

		DispatchMessage(&Msg);

	}

	return Msg.wParam;

}

AppendMenu(hSubMenu, MF_STRING, ID_STUFF_GO3, "Štruktúra zložiek");

Creating a Child Process with Redirected Input and Output http://msdn.microsoft.com/en-us/library/ms682499(v=vs.85).aspx

Ďakujem veľmi si mi pomohol.