VC++ 剪贴板编程

亦凉 2022-11-16 15:14 148阅读 0赞

新建一个对话框工程；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70][]

双击按钮，让你输入单击的成员函数名称，然后进入代码编辑；

void CJieqieDlg::OnButton1() 
    {
    	// TODO: Add your control notification handler code here
    	    if( !OpenClipboard() )
        {
            AfxMessageBox( _T("Cannot open the Clipboard!") );
            return;
        }
    
        if( !EmptyClipboard() )
        {
            AfxMessageBox( _T("Cannot empty the Clipboard!") );
            return;
        }
    
        // 取回当前控件的数据，hData开辟全局内存区域，存放数据
        CString str;
        this->GetDlgItemText( IDC_EDIT1, str );
        size_t cbStr = (str.GetLength()+1)*sizeof(TCHAR);
        HGLOBAL hData = GlobalAlloc(GMEM_MOVEABLE, cbStr);
        //memcpy_s( GlobalLock(hData), cbStr, str.LockBuffer(), cbStr );
    	memcpy( GlobalLock(hData), str.LockBuffer(), cbStr );
        GlobalUnlock( hData );
        str.UnlockBuffer();
    
        UINT uiFormat = (sizeof(TCHAR)==sizeof(WCHAR)) ? CF_UNICODETEXT : CF_TEXT;
        if(::SetClipboardData( uiFormat, hData ) == NULL )
        {
            AfxMessageBox(_T("Unable to set Clipboard data"));
            CloseClipboard();
            return;
        }
        CloseClipboard();
    }
    
    void CJieqieDlg::OnButton2() 
    {
    	// TODO: Add your control notification handler code here
    	if( !OpenClipboard() )
        {
            AfxMessageBox( _T("Cannot open the Clipboard!") );
            return;
        }
    
        // 选择合适的格式，读取的时候不用获得剪贴板的拥有权
        UINT uiFormat = (sizeof(TCHAR)==sizeof(WCHAR) ? CF_UNICODETEXT : CF_TEXT );
        HANDLE hData = ::GetClipboardData( uiFormat );
        if( NULL == hData )
        {
            AfxMessageBox( _T("Unable to get Clipboard data!") );
            CloseClipboard();
            return;
        }
        CString str;
        LPCTSTR lpdata = (LPCTSTR)GlobalLock(hData);
        this->SetDlgItemText( IDC_EDIT2, lpdata );
        GlobalUnlock( hData );
        CloseClipboard();
    }

运行如下；在第一个框随便输入，单击按钮1，然后单击按钮2，内容拷贝到第二个框；在二个程序之间也可以操作；先打开剪贴板，然后操作，然后关闭剪贴板；剪贴板编程通常会用到GlobalAlloc函数；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 1][]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70 1]: /images/20221022/7396568ddeda408c853953b03ad8add3.png