} catch(_com_error e)///捕捉异常 { CString errormessage; errormessage.Format("连接数据库失败!\r\n错误信息:%s",e.ErrorMessage()); AfxMessageBox(errormessage);///显示错误信息 } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 在这段代码中我们是...
error message box, like the one inFigure 2. If only one field is bad, CMainDlg calls CRegexForm::ShowBadField to highlight the field and display an error message in the feedback window, as inFigure 3. If all the fields are OK, TestForm displays a message box sho...
tk.messagebox.showerror(title='Hi', message='No!!...tk.messagebox.asktrycancel(title='Hi', message='hahahaha')) # return True, False print(tk.messagebox.askokcancel...解决方案是import tkinter.messagebox module 'tkinter.messagebox' has no attribute 'asktrycancel' 注意:在新版本的Tkinter...警...
BEGIN_MESSAGE_MAP(CToolTipWnd, CWnd) //{{AFX_MSG_MAP(CToolTipWnd) ON_WM_PAINT() ON_WM_CREATE() //}}AFX_MSG_MAP END_MESSAGE_MAP() /// // CToolTipWnd message handlers BOOL CToolTipWnd::Create(CWnd* pParentWnd) { BOOL bRet = CWnd::CreateEx(NULL, lpWndCls, NULL, WS_POPUP, 0...
由于combobo已经设置成Unicode,SendMessageA自动按照当前代码页(ACP)转码成Unicode,而不是按SetThreadUILanguage所设置的语言转码,导致出现乱码。 解决方案有两种: 方案一:流行,但回避矛盾 既然MFC的初始化代码会导致乱码,那么combobox的初始值就干脆不在资源编辑器里设置,而是独立成一条字符串放到string table里,用的时候...
covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR); // Start Excel and get Application object. if(!app.CreateDispatch("Excel.Application")) { AfxMessageBox("Couldn't CreateDispatch on Excel"); return; } // Set visible. app.SetVisible(TRUE); ...
covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR); // Start Excel and get Application object. if(!app.CreateDispatch("Excel.Application")) { AfxMessageBox("Couldn't CreateDispatch on Excel"); return; } // Set visible. app.SetVisible(TRUE); ...
根据参数的类型或个数不同，进行不同的处理。5. 消息和线程没有必然关系。只能说线程也是通过消息来联系。你所说的两个消息应该是LIST BOX控件吧。当你选中另一个列表选项后，CHANGED发生，当你按下鼠标去选另一项，但还没松开时CHANGING发生，或者你要拖动选择多项还没松开鼠标时发生。
Either change the application to handle messages, or use the SendKeys.SendWait method." Now that's what I call a friendly error message! Let this be an example to you all. But before you run off to use SendKeys, be advised that it's not as reliable as SendI...
// Note: prevents calling message loop things in 'ExitInstance' // will never be decremented #endif return FALSE; } #ifdef _DEBUG if (m_nDisablePumpCount != 0 ) { TRACE0( " Error: CWinThread::PumpMessage called when not permitted.n " ); ...