Thread: C++ Win32 no window, yes on task manager

I'm having problems with my code...the code doesn't show a window, but is in the taskbar manager list...any ideas

// CWnd32.h

Code:

#include <windows.h>
#include <string>

using std::string;

class CWnd32  
{
public:
	int ShowUI(const string &,int,int,int,bool);
	BOOL InitInstance(HINSTANCE,const string &);
	CWnd32();
	virtual ~CWnd32();

private:
	WNDCLASSEX m_wcx;
	HWND hwnd;

protected:
	static LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
	LRESULT CALLBACK fakeWndProc(UINT,WPARAM,LPARAM);

};

// CWnd32.cpp

Code:

#include "Wnd32.h"

CWnd32::~CWnd32()
{
	UnregisterClass(m_wcx.lpszClassName, m_wcx.hInstance);
	if (hwnd) DestroyWindow(hwnd);
}

CWnd32::CWnd32()
{
	ZeroMemory(&m_wcx,sizeof(WNDCLASSEX));
}

BOOL CWnd32::InitInstance(HINSTANCE _hInstance, const string &strClass)
{
	m_wcx.cbSize = sizeof(WNDCLASSEX);
	m_wcx.cbClsExtra = 0;
	m_wcx.cbWndExtra = 0;
	m_wcx.hInstance = _hInstance;
	m_wcx.lpszClassName = strClass.c_str();
	m_wcx.lpszMenuName = 0;
	m_wcx.lpfnWndProc = CWnd32::WndProc;
	m_wcx.style = CS_DBLCLKS|CS_HREDRAW|CS_VREDRAW;
	m_wcx.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	m_wcx.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
	m_wcx.hCursor = LoadCursor(NULL, IDC_ARROW);
	m_wcx.hbrBackground = GetSysColorBrush(COLOR_BTNFACE);
	return RegisterClassEx(&m_wcx);
}

int CWnd32::ShowUI(const string &strTitle,int w,int h,int nShow,bool centre)
{
	hwnd = CreateWindow(m_wcx.lpszClassName,strTitle.c_str(),WS_POPUPWINDOW|WS_CAPTION|WS_MINIMIZEBOX|WS_CLIPCHILDREN|WS_CLIPSIBLINGS,1,2,w,h,NULL,NULL,m_wcx.hInstance,this);
	if (!hwnd) return -2;
	ShowWindow(hwnd,nShow);
	UpdateWindow(hwnd);
	return 0;
}

LRESULT CALLBACK CWnd32::WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	CWnd32 *self;
	if (msg == WM_NCCREATE)
	{
		self = (CWnd32*)((LPCREATESTRUCT)lParam)->lpCreateParams;
		SetWindowLong(hWnd,GWL_USERDATA,(LONG)self);
	}
	else
	{
		self = (CWnd32*)GetWindowLong(hWnd,GWL_USERDATA);
		if(!self) return DefWindowProc(hWnd,msg,wParam,lParam);
	}
	self->hwnd = hWnd;
	return self->fakeWndProc(msg,wParam,lParam);
}

LRESULT CALLBACK CWnd32::fakeWndProc(UINT msg, WPARAM wParam, LPARAM lParam)
{
	switch (msg)
	{
	case WM_CREATE:
		{
			return 0;
		}
	case WM_COMMAND:
		{
			return 0;
		}
	case WM_CLOSE:
		{
			DestroyWindow(hwnd);
			return 0;
		}
	case WM_DESTROY:
		{
			PostQuitMessage(0);
			return 0;
		}
	}
	return DefWindowProc(hwnd,msg,wParam,lParam);
}

// main.cpp

Code:

#include "Wnd32.h"

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
	int ret_val = -1;
	CWnd32 *ptr = new CWnd32;
	if (ptr->InitInstance(hInstance,"my_damn_class"))
	{
		MSG Msg;
		// show the main window
		ptr->ShowUI("hola",150,150,nShowCmd,true);
		while(GetMessage(&Msg,0,0,0))
		{
			TranslateMessage(&Msg);
			DispatchMessage(&Msg);
		}
		ret_val = Msg.wParam;
	}
	delete ptr;
	return ret_val;
}