static function vc++

[mperlera]

:(Hello!, I have a problem with static function, to access to member variable at same dialog class, both the static function and member variable are class members. The problem begin when i try compile a program with a function in a AfxBeginThead instruction with errors. I solve that problem, using a static function, but now i can't access a data member variable, of the dialog class of my project. Please help me!!! Thank for your collaboration. greating. mperlera

[Dave Bryant]

Since static functions do not have an implicit 'this' pointer, you cannot access any member (non-static) functions or data from within the static function. However, AfxBeginThread() allows to provide a user-defined parameter to your static thread function. In this case, you can pass in the pointer to the dialog as the user-defined parameter, and then use that within your thread function to get at the members. Dave http://www.cloudsofheaven.org

[Dean Goodman]

What you usually do is something like the following:

UINT CMyClass::ThreadFunc(LPVOID p) //this is your static func
{
CMyClass* pMyClass = (CMyClass*)p;

p->SomeNonStaticFunc(); //access non-static member functions
p->DataMember = 0; //access non-static member data
...
return 0; //return your thread exit code
}

void CMyClass::SomeFunc()
{
AfxBeginThread(ThreadFunc, this); //start your thread function
}

--Dean