C / C++ / MFC

HINSTANCE	g_hInstance=			NULL;
HMENU		g_hMenu=				NULL;
HWND		g_hOwner=				NULL;

#pragma data_seg(".SHARED")
HWND		g_hWnd=					NULL;
HWND		g_hTextBox=				NULL;
WNDPROC		g_hOldTextBoxProc=		NULL;
COLORREF	g_clrTextColor=			RGB(192,192,192);
COLORREF	g_clrBackColor=			0;
HBRUSH		g_hBrush=				NULL;
HFONT		g_hFont=				NULL;
BOOL		g_bShowTime=			FALSE;
BOOL		g_bShowSourceHwnd=		FALSE;
BOOL		g_bShowSourceCaption=	FALSE;
UINT		g_uRefCount=			0;
#pragma data_seg()


BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
	switch(dwReason)
	{
	case DLL_PROCESS_ATTACH:
		g_hInstance=hInstance;
		g_uRefCount++;
		break;
	case DLL_PROCESS_DETACH:
		g_uRefCount--;
		if (g_uRefCount==0)
		{
			DeleteObject(g_hBrush);
			DeleteObject(g_hFont);
			SetWindowLong(g_hTextBox, GWL_WNDPROC, (LONG)g_hOldTextBoxProc);
			DestroyWindow(g_hWnd);
		}
		break;
	}
	return TRUE;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	RECT rect;
	LOGFONT lf;

	switch(uMsg)
	{
	case WM_CREATE:
		g_hTextBox=CreateWindowEx(WS_EX_CLIENTEDGE,
			"EDIT",
			NULL,
			WS_VISIBLE|WS_CHILD|WS_BORDER|WS_HSCROLL|WS_VSCROLL|ES_MULTILINE|ES_NOHIDESEL,
			1,
			1,
			1,
			1,
			hWnd,
			NULL,
			g_hInstance,
			NULL);
		if (!g_hTextBox)
			return -1;
		lf.lfCharSet=ANSI_CHARSET;
		lf.lfClipPrecision=CLIP_DEFAULT_PRECIS;
		lf.lfEscapement=0;
		strcpy(lf.lfFaceName, "Courier");
		lf.lfHeight=-10;
		lf.lfItalic=0;
		lf.lfOrientation=0;
		lf.lfOutPrecision=OUT_DEFAULT_PRECIS;		
		lf.lfPitchAndFamily=FF_ROMAN|DEFAULT_PITCH;
		lf.lfQuality=DRAFT_QUALITY;
		lf.lfStrikeOut=0;
		lf.lfUnderline=0;
		lf.lfWeight=FW_NORMAL;
		lf.lfWidth=0;
		g_hFont=CreateFontIndirect(&lf);
		SendMessage(g_hTextBox, WM_SETFONT, (WPARAM)g_hFont, 0);
		g_hOldTextBoxProc=(WNDPROC)SetWindowLong(g_hTextBox, GWL_WNDPROC, (LONG)EditWndProc);
		return 0;
		break;
//Other cases as well...
}

BOOL WINAPI ConInit(HWND hWndOwner)
{
	WNDCLASS wc;
	g_hOwner=hWndOwner;
	if (!g_hWnd)
	{
		memset(&wc, 0, sizeof(WNDCLASS));
		wc.hbrBackground=(HBRUSH)(COLOR_BTNFACE+1);
		wc.hCursor=LoadCursor(NULL, IDC_ARROW);
		wc.hInstance=g_hInstance;
		wc.lpfnWndProc=WndProc;
		wc.lpszClassName="DebugConsole";

		if (!RegisterClass(&wc))
			return FALSE;

		g_hWnd=CreateWindow("DebugConsole",
			"Debug Console",
			WS_OVERLAPPEDWINDOW&~WS_MAXIMIZEBOX,
			CW_USEDEFAULT,
			CW_USEDEFAULT,
			600,
			300,
			NULL,
			NULL,
			g_hInstance,
			NULL);
		if (!g_hWnd)
			return FALSE;
		g_hMenu=CreateMenu();
		AppendMenu(g_hMenu, MF_STRING, IDM_CLOSE, "Close");
		SetMenu(g_hWnd, g_hMenu);
		g_hBrush=CreateSolidBrush(g_clrBackColor);
	}
	return TRUE;
}