Thread: having problems making the window a diferent background colour

why dosent this make g_hWnd2 black background ,,

Code:

#include <windows.h>
#include "WM_CHARH.h"
//#include "CreateWindowTwo.h"
//#include "WndProcH.h"
//Global Varibles
HWND g_hWnd;
HWND g_hWnd2;
char *WinApp = "WinApp";
char *WinApp2 = "WinApp2";
WNDCLASSEX wc;
WNDCLASSEX wc2;
//Function Prototypes
LRESULT WINAPI WndProc(HWND,UINT,WPARAM,LPARAM); //main windows function
void RegisterWindowClass(HINSTANCE hInstance);
void RegisterWindowClass2(HINSTANCE hInstance);
void CreateAppWindow(HINSTANCE hInstance);
void CreateAppWindow2(HINSTANCE hInstance);
WPARAM StartMessageLoop();

//Global Varibles
//HWND g_hWnd;


INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{

	RegisterWindowClass(hInstance);
	CreateAppWindow(hInstance);
	RegisterWindowClass2(hInstance);
	CreateAppWindow2(hInstance);
	//ShowWindow(g_hWnd , SW_SHOWDEFAULT);
	ShowWindow(g_hWnd , SW_NORMAL);
	UpdateWindow(g_hWnd);
	INT result = StartMessageLoop();
	return result;
}


LRESULT CALLBACK WndProc(HWND hWnd  ,UINT msg , WPARAM wParam , LPARAM lParam)
{
	
	switch(msg)
	{
	case WM_CREATE:
		return 0;

	case WM_DESTROY:
		PostQuitMessage(0);
		break;

	case WM_PAINT:
		ValidateRect(g_hWnd, NULL);
		return 0;
 
	case WM_COMMAND:
        break;

	case WM_KEYDOWN: break;
          

    case WM_CHAR: 
		 WM_CHARH(wParam , g_hWnd , g_hWnd2); break;

			

	 
	
	
	}

	return DefWindowProc(hWnd , msg , wParam , lParam);
	
}

//RegisterWindow 1
void RegisterWindowClass(HINSTANCE hInstance)
{

wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL , IDI_APPLICATION); 
wc.hCursor = (HCURSOR)LoadCursor(NULL , IDC_ARROW); //Mouse Cursor 
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); //background window colour
wc.lpszMenuName = NULL;
wc.lpszClassName = WinApp;
wc.hIconSm = NULL;

RegisterClassEx(&wc);
}

void CreateAppWindow(HINSTANCE hInstance)
{

g_hWnd = CreateWindowEx(
					 NULL, 
					 "WinApp",
					 "Basic Windows Application",
                     WS_OVERLAPPEDWINDOW, 
					 //NULL,
					 100, 
					 100,
					 648,
					 514,
					 GetDesktopWindow(),
					 NULL,
					 hInstance,
					 NULL
					 );
}

//RegisterWindow 2
void RegisterWindowClass2(HINSTANCE hInstance)
{
wc2.cbSize = sizeof(WNDCLASSEX);
wc2.style = CS_HREDRAW; /*| CS_VREDRAW | CS_OWNDC;*/
wc2.lpfnWndProc = WndProc;
wc2.cbClsExtra = 0;
wc2.cbWndExtra = 0;
wc2.hInstance = hInstance;
wc2.hIcon = LoadIcon(NULL , IDI_INFORMATION); 
wc2.hCursor = (HCURSOR)LoadCursor(NULL , IDC_ARROW); //Mouse Cursor 
//wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH+21); //background window colour
wc2.hbrBackground = (HBRUSH)(GetStockObject(BLACK_BRUSH+1));
wc2.lpszMenuName = "new";
wc2.lpszClassName = WinApp2;
wc2.hIconSm = NULL;

RegisterClassEx(&wc2);
}

void CreateAppWindow2(HINSTANCE hInstance)
{

g_hWnd2 = CreateWindowEx(
					 NULL, 
					 WinApp2,
					 "Basic Windows Application",
                     WS_OVERLAPPEDWINDOW | WS_CHILD,
					 1, 
					 1,
					 500,
					 200,
					 g_hWnd,
					 NULL,
					 hInstance,
					 NULL
					 );
}


WPARAM StartMessageLoop()
{
MSG msg;

while(1)
{
	if(PeekMessage(&msg , NULL , 0 , 0 , PM_REMOVE))
	{
		if(msg.message == WM_QUIT)
		break;
        TranslateMessage(&msg);
	    DispatchMessage(&msg);
	}
	else
	{
	//	UpdateWindow(g_hWnd);
	//	UpdateWindow(g_hWnd2);
      //use idle time here
	}
}

return msg.wParam;
}

ok thanks for the advice