环境：vs2017，win7
//Hello.h
class CMyApp :public CWinApp
{
public:
virtual BOOL InitInstance();
};
class CMainWindow:public CFrameWnd
{
public:
CMainWindow();
protected:
afx_msg void OnPaint();
DECLARE_MESSAGE_MAP()
};
//Hello.cpp
#include <afxwin.h>
#include "Hello.h"
CMyApp myApp;
BOOL CMyApp::InitInstance()
{
m_pMainWnd = new CMainWindow;
m_pMainWnd->ShowWindow(m_nCmdShow);
m_pMainWnd->UpdateWindow();
return TRUE;
}
BEGIN_MESSAGE_MAP(CMainWindow,CFrameWnd)
ON_WM_PAINT()
END_MESSAGE_MAP()
CMainWindow::CMainWindow()
{
Create(NULL, _T("the hello application"));
}
void CMainWindow::OnPaint()
{
CPaintDC dc(this);
CRect rect;
GetClientRect(&rect);
dc.DrawText(_T("hello,MFC"), -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
}
直接编译vs2017会提示要定义入口点。
按照下面设置，就解决了：
右键->属性->链接器->系统->子系统，下拉框选择：窗口 (/SUBSYSTEM:WINDOWS)
