Question

CMainFrame *pMain = (CMainFrame*)AfxGetMainWnd()，应该怎么用

void CMyDialog::OnOK() { UpdateData(TRUE); char *name = new char[50]; strcpy(name,m_edit1); char *add = new char[50]; strcpy(add,m_edit2); CMainFrame *pMain = (CMainFrame*)AfxGetMainWnd(); CView *pView = pMain->GetActiveView(); pView->PostMessage(WM_MYMSG,(unsigned int)name,(unsigned int)add); //CDialog::OnOK(); }

为什么会报错啊，
error C2065: 'pMain' : undeclared identifier
error C2065: 'CMainFrame' : undeclared identifier

Answer 1

将CMainFrame *pMain = (CMainFrame*)AfxGetMainWnd(); CView *pView = pMain->GetActiveView();
改成：
CView *pView = AfxGetMainWnd()->GetActiveView();
“error C2065: 'CMainFrame' : undeclared identifier”的意思就是CMainFrame类未定义，你要在CMyDialog的cpp文件中包含包含CMainFrame类的头文件，因为现在的错误是找不到CMainFrame。

Answer 2

void CMyDialog::OnOK() { UpdateData(TRUE); char *name = new char[50]; strcpy(name,m_edit1); char *add = new char[50]; strcpy(add,m_edit2); CMainFrame *pMain = (CMainFrame*)AfxGetMainWnd(); CView *pView = pMain->GetActiveView(); pView->PostMessage(WM_MYMSG,(unsigned int)name,(unsigned int)add); //CDialog::OnOK(); }

记得加入头文件吧,在头部加入 #include "MainFrm.h"

Answer 3

你好，“error C2065: 'CMainFrame' : undeclared identifier”的意思就是CMainFrame类未定义，你要在CMyDialog的cpp文件中包含包含CMainFrame类的头文件，因为现在的错误是找不到
CMainFrame，

Answer 4

应该是没有加入头文件吧,在头部加入 #include "MainFrm.h"

Answer 5

CMainFrame *pMain = (CMainFrame*)AfxGetMainWnd(); CView *pView = pMain->GetActiveView();
改成：
CView *pView = AfxGetMainWnd()->GetActiveView();