如何将主 Dlg 的指针从线程传递到 MFC 内部的函数

Question

There are two Thread sharing a funciton. I want to show information in Dlg when I run the function. But I don't know how to pass the pointer of main Dlg. When I run the following code ,it shows ERROR 2061.

XXXTab.h

static void Snap(CBoxUnstackingDlg *CMFCAppDlg);

static UINT __cdecl MtA(LPVOID lpParam);
static UINT __cdecl MtB(LPVOID lpParam);

XXXTab.cpp

void CThirdTab::Snap(CBoxUnstackingDlg *CMFCAppDlg)```
{
}

UINT __cdecl CThirdTab::MtA(LPVOID lpParam)
{
   CBoxUnstackingDlg *CMFCAppDlg = (CBoxUnstackingDlg *)lpParam;
   Snap(CMFCAppDlg );
}

UINT __cdecl CThirdTab::MtB(LPVOID lpParam)
{
   CBoxUnstackingDlg *CMFCAppDlg = (CBoxUnstackingDlg *)lpParam;
   Snap(CMFCAppDlg );
}

Answer 1

I found the reason is two headers include each other. Making the function Snap out of class Thirdtab can fix the problem.