VC6里边这样加载位图有错么？

#include <AFXWIN.H>
#include "resource.h"
LRESULT CALLBACK WndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd ){
	WNDCLASS wnd;
	wnd.cbClsExtra=0;
	wnd.cbWndExtra=0;
	wnd.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
	wnd.hCursor=LoadCursor(hInstance,(LPCTSTR)IDC_CURSOR2);
	wnd.hIcon=LoadIcon(hInstance,IDI_APPLICATION);
	wnd.hInstance=hInstance;
	wnd.lpfnWndProc=WndProc;
	wnd.lpszClassName="window";
	wnd.lpszMenuName=NULL;
	wnd.style=CS_HREDRAW|CS_VREDRAW;

	RegisterClass(&wnd);

	HWND hwnd;
	hwnd=CreateWindow("window","MyWindow",WS_OVERLAPPEDWINDOW,100,100,400,300,NULL,NULL,hInstance,NULL);

	ShowWindow(hwnd,nShowCmd);

	MSG msg;
	while(GetMessage(&msg,NULL,0,0)){
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return 0;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam){
	HDC hdc;
	PAINTSTRUCT ps;
	HDC MemDC;
	HBITMAP bmp=LoadBitmap(NULL,(LPCSTR)IDB_BITMAP1);
	RECT r={10,10,500,500};

	switch(uMsg){
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	case WM_PAINT:
		hdc=BeginPaint(hwnd,&ps);//设备描述表
			MemDC=CreateCompatibleDC(hdc);//内存DC
				CreateCompatibleBitmap(MemDC,500,500);
				SelectObject(MemDC,bmp);//在内存DC内加载位图
				BitBlt(hdc,10,10,400,400,MemDC,0,0,SRCCOPY);
			DeleteDC(MemDC);
		EndPaint(hwnd,&ps);
		break;
	}
	return DefWindowProc(hwnd,uMsg,wParam,lParam);
}