1-2 VisualStudioでプロジェクトを作ってみる

#include <Windows.h>

const WCHAR mClassName[] = L"TestProgramClass";
const WCHAR mTitleName[] = L"テストプログラム";

LRESULT CALLBACK WinProc( HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam )
{
    switch (uMsg)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    case WM_SYSCOMMAND:
        switch (wParam)
        {
        case SC_CLOSE:
            PostQuitMessage(0);
            return 0;
        }
        break;
    }
    return DefWindowProcW(hWnd, uMsg, wParam, lParam);
}

int WINAPI WinMain( HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpszCmdParam,int nCmdShow )
{
    // ウインドウクラス登録
    WNDCLASSW wc;
    ZeroMemory( &wc,sizeof(wc) );
    wc.style            = CS_HREDRAW | CS_VREDRAW | CS_BYTEALIGNCLIENT;
    wc.lpfnWndProc      = WinProc;
    wc.cbClsExtra       = 0;
    wc.cbWndExtra       = 0;
    wc.hInstance        = hInstance;
    wc.hIcon            = LoadIconW( hInstance,IDI_APPLICATION );
    wc.hCursor          = LoadCursorW( NULL, IDC_ARROW );
    wc.hbrBackground    = (HBRUSH)GetStockObject( WHITE_BRUSH );
    wc.lpszMenuName     = NULL;
    wc.lpszClassName    = mClassName;
    if( !RegisterClassW(&wc) )
        return -1;

    // ウインドウ生成
    HWND hWnd = CreateWindowExW( 0, mClassName, mTitleName, WS_OVERLAPPEDWINDOW | WS_VISIBLE, 100, 100, 640, 480, NULL, NULL, hInstance, NULL );
    if( !hWnd )
        return -1;

    MSG msg;
    while( GetMessage(&msg,NULL,0,0) ) {
        TranslateMessage( &msg );
        DispatchMessage( &msg );
    }

    DestroyWindow( hWnd );
    return 0;
}