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win32 API - Problema com registo de classe

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Dexter's Lab

Boas pessoal, estou com um problema no registo de uma classe no win32 api.

Não sei porque razão, a última classe que estou a tentar registar está a fazer retornar 0, ou seja, algo ali está errado. Mas sou novo nesta API e gostaria de saber o motivo de isto estar assim. Estou de volta disto há horas. Tenho lido imensa documentação mas no entanto não encontro a solução.

	int WINAPI WinMain (HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nFunsterStil)
{
static char mainW_class[ ] = "MainWindow";
static char toolsW_class[ ] = "ToolsWindow";
static char submenuW_class[ ] = "SubmenuWindow";

HWND hwnd, tools, submenu; //handle
MSG messages;			

WNDCLASSEX mainWStruct, toolsWStruct, submenuWStruct;

/*		 generates main window	*/
mainWStruct.hInstance = hThisInstance;
mainWStruct.lpszClassName = mainW_class;
mainWStruct.lpfnWndProc = WindowProcedure;
mainWStruct.style = CS_DBLCLKS;
mainWStruct.cbSize = sizeof(WNDCLASSEX);
mainWStruct.hIcon = LoadIcon (NULL, IDI_APPLICATION);
mainWStruct.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
mainWStruct.hCursor = LoadCursor (NULL, IDC_ARROW);
mainWStruct.lpszMenuName = NULL;		
mainWStruct.cbClsExtra = 0;					
mainWStruct.cbWndExtra = 0;					
mainWStruct.hbrBackground = GetSysColorBrush(10);

if (!RegisterClassEx (&mainWStruct))
	return 0;							[b]  //<-----REGISTADO OK![/b]

hwnd = CreateWindowEx (
	   0,
	   mainW_class,
	   "project title",
	   WS_SYSMENU | WS_BOXES,
	   0, 0,
	   GetSystemMetrics(SM_CXSCREEN),
	   GetSystemMetrics(SM_CYSCREEN)-1,
	   HWND_DESKTOP,
	   NULL, //menu
	   hThisInstance,
	   NULL);


toolsWStruct.hInstance = hThisInstance;
toolsWStruct.lpszClassName = toolsW_class;
toolsWStruct.lpfnWndProc = WindowProcedure;
toolsWStruct.style = CS_DBLCLKS;
toolsWStruct.cbSize = sizeof(WNDCLASSEX);
toolsWStruct.hIcon = LoadIcon(NULL, IDI_APPLICATION);
toolsWStruct.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
toolsWStruct.hCursor = LoadCursor (NULL, IDC_HAND);
toolsWStruct.lpszMenuName = NULL;
toolsWStruct.cbClsExtra = 0;
toolsWStruct.cbWndExtra = 0;
toolsWStruct.hbrBackground = GetSysColorBrush(0);

if (!RegisterClassEx (&toolsWStruct))
	return 0;						  [b] //<-------------REGISTADO OK![/b]

  tools = CreateWindowEx(
	  0,
	  toolsW_class,
	  "Ferramentas",
	  WS_CHILD | WS_DLGFRAME | WS_EX_PALETTEWINDOW,
	  -SM_CXBORDER,
	  -SM_CYBORDER,
	  GetSystemMetrics(SM_CXFULLSCREEN) / 4,
	  GetSystemMetrics(SM_CYFULLSCREEN),
	  hwnd,
	  NULL,
	  hThisInstance,
	  NULL);


 submenuWStruct.hInstance = hThisInstance;
 submenuWStruct.lpszClassName = submenuW_class;
 submenuWStruct.lpfnWndProc = WindowProcedure;
 submenuWStruct.style = WS_BORDER;
 submenuWStruct.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
 submenuWStruct.cbSize = sizeof(WNDCLASSEX);
 submenuWStruct.hIcon = LoadIcon(NULL, IDI_APPLICATION);
 submenuWStruct.hCursor = LoadCursor(NULL, IDC_ARROW);
 submenuWStruct.lpszMenuName = NULL;
 submenuWStruct.cbClsExtra = 0;
 submenuWStruct.cbWndExtra = 0;
 submenuWStruct.hbrBackground = GetSysColorBrush(4);

if (!RegisterClassEx(&submenuWStruct))
	return 0;							   [b] //<-----RETORNA 0.. NAO REGISTA... PORQUÊ?[/b]

 submenu = CreateWindowEx(
				   0,
				   submenuW_class,
				   "add",
				   WS_VISIBLE | WS_CHILD,
				   0,
				   0,
				   GetSystemMetrics(SM_CXFULLSCREEN),
				   GetSystemMetrics(SM_CYFULLSCREEN) / 5,
				   hwnd,
				   (HMENU) NULL,
				   hThisInstance,
				   NULL);


ShowWindow (hwnd, nFunsterStil);
ShowWindow (tools, nFunsterStil);
ShowWindow (submenu, nFunsterStil);


while (GetMessage (&messages, NULL, 0, 0))
{

	TranslateMessage(&messages);

	DispatchMessage(&messages);
}

return messages.wParam;
}

Edited by Dexter's Lab

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Dexter's Lab

Acabei por descobrir sozinho. Isto acontece porque HINSTANCE só armazena 6 campos .ddl [CLASS], e estando 4 já ocupados, apenas temos sobra para dois espaços, ou seja, duas classes próprias. Para quem precise, eis a razão.

Vou tentar contornar o problema, depois coloco aqui.

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HappyHippyHippo

estás a criar mais do que seis janelas ao mesmo tempo ??

isso é algum tipo de offline popup app ??


IRC : sim, é algo que ainda existe >> #p@p

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Dexter's Lab

HHHippo, estou apenas a aprender, não é nenhum projecto.

Preciso criar uma biblioteca dinâmica (dll) e preenchê-la com as classes que necessito e depois chamá-la. Porque a que vem, já tem 4 campos definidos. A minha ideia é criar um layout com duas toolbars. Precisava 3 classes neste caso, para ambas as toolbars e para a main-window.

Edited by Dexter's Lab

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