windows MFC消息demo

1、在BEGIN_MESSAGE_MAP添加MAP映射

BEGIN_MESSAGE_MAP(CdesktopTotalMapDlg, CDialogEx)ON_MESSAGE(WM_SYS_NORMAL_MSG, OnSysNormalMessage)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_BN_CLICKED(IDC_BUTTON_SELECTSOURCEDIR, &CdesktopTotalMapDlg::OnBnClickedButtonSelectsourcedir)ON_BN_CLICKED(IDC_BUTTON_SELECTDSTFILE, &CdesktopTotalMapDlg::OnBnClickedButtonSelectdstfile)ON_BN_CLICKED(IDC_BUTTON_STARTMARGE, &CdesktopTotalMapDlg::OnBnClickedButtonStartmarge)
END_MESSAGE_MAP()

2、添加头文件声明

LRESULT OnSysNormalMessage(WPARAM wParam, LPARAM lParam );

3、添加OnSysNormalMessage函数定义

LRESULT CdesktopTotalMapDlg::OnSysNormalMessage(WPARAM wParam, LPARAM lParam )
{switch (wParam){case 0:UpdateData(FALSE);CEdit*pedit=(CEdit*)GetDlgItem(IDC_EDIT_SHOWLOG);int nline=pedit-> GetLineCount();pedit-> LineScroll(nline-1);break;}return NULL;
}

4、调用

#define  WM_SYS_NORMAL_MSG_SHOWLOG 0
SYS_PostNormalMsg( WM_SYS_NORMAL_MSG_SHOWLOG , NULL);