Directx初始化窗体

#include <windows.h>#include <d3dx9.h>HINSTANCE hInstance;LRESULT CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam){switch(uMsg){case WM_DESTROY:PostQuitMessage(0);break;default:return DefWindowProc(hWnd, uMsg, wParam, lParam);}return 0;}int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd){MSG msg;ZeroMemory(&msg, sizeof(MSG));WNDCLASSEX wc;wc.cbClsExtra = 0;wc.cbSize = sizeof(wc);wc.cbWndExtra = 0;wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);wc.hCursor = LoadCursor(NULL, IDC_ARROW);wc.hIcon = LoadIcon(NULL, IDI_WINLOGO);wc.hIconSm = NULL;wc.hInstance = hInstance;wc.lpfnWndProc = WinProc;wc.lpszClassName = "refind";wc.lpszMenuName = NULL;wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;RegisterClassEx(&wc);HWND hWnd;hWnd = CreateWindowEx(WS_EX_APPWINDOW, "refind", "refind", WS_OVERLAPPEDWINDOW | WS_VISIBLE, 100, 100, 800, 600, NULL, NULL, hInstance, NULL);ShowWindow(hWnd, SW_NORMAL);UpdateWindow(hWnd);while(msg.message != WM_QUIT){if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)){TranslateMessage(&msg);DispatchMessage(&msg);}else{}}return 0;}