C言語／C++/GdiTest - Sample is best!

開発環境	Microsoft Visual C++ 2010 Express (SP1)
実行環境	Microsoft Windows XP Home Edition (SP3)
プロジェクトの種類	Win32 プロジェクト
プロジェクト名	GdiTest
アプリケーションの種類	Windows アプリケーション
追加のオプション	空のプロジェクト
文字セット	Unicode

参考

第３３６章 ＧＤＩ＋の基礎　その２

GdiTest.cpp

#pragma comment(lib, "gdiplus.lib")
 
#include <Windows.h>
#include <GdiPlus.h>
 
using namespace Gdiplus;
 
// 関数プロトタイプ宣言
LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 
// グローバル変数
TCHAR g_szClassName[] = TEXT("GdiTest");
TCHAR g_szWindowName[] = TEXT("GDI+ Test");
Image *g_img = NULL;
 
//==============================================================================
int APIENTRY wWinMain(
	HINSTANCE hInstance,
	HINSTANCE hPrevInstance,
	LPTSTR lpCmdLine,
	int nCmdShow)
{
	WNDCLASSEX wcex;
	HWND hWnd;
	MSG msg;
	ULONG_PTR token;
	GdiplusStartupInput input;
 
	GdiplusStartup(&token, &input, NULL);
	g_img = Image::FromFile(lpCmdLine);
 
	wcex.cbSize		= sizeof wcex;
	wcex.style		= CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc	= WindowProc;
	wcex.cbClsExtra		= 0;
	wcex.cbWndExtra		= 0;
	wcex.hInstance		= hInstance;
	wcex.hIcon		= LoadIcon(NULL, IDI_APPLICATION);
	wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
	wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW + 1);
	wcex.lpszMenuName	= NULL;
	wcex.lpszClassName	= g_szClassName;
	wcex.hIconSm		= LoadIcon(NULL, IDI_APPLICATION);
	if (RegisterClassEx(&wcex) == 0) {
		return 0;
	}
 
	hWnd = CreateWindow(
		g_szClassName,
		g_szWindowName,
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT, 0,
		CW_USEDEFAULT, 0,
		NULL,
		NULL,
		hInstance,
		NULL);
	if (hWnd == NULL) {
		return 0;
	}
	ShowWindow(hWnd, nCmdShow);
	UpdateWindow(hWnd);
 
	while (GetMessage(&msg, NULL, 0, 0)) {
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	GdiplusShutdown(token);
	return msg.wParam;
}
 
//------------------------------------------------------------------------------
LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;
 
	switch (uMsg) {
	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);
		{
		Graphics g(hdc);
		g.DrawImage(g_img, 0, 0);
		}
		EndPaint(hWnd, &ps);
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, uMsg, wParam, lParam);
	}
	return 0;
}