CreateThread or CWinThread

[mccanaveras]

Hello,

I need to implement a Thread in a Visual C++ 6.0 application. I've never done this, then I've been investigating, but I don't have any properly solution.

One of them is use CWinThread to comunicate to a Dialog but it has been already created. And the other possibility is create a thread with the function CreateThread(), but it gives me an error in the third parameter:

error C2664: 'CreateThread' : cannot convert parameter 3 from 'unsigned long (class CDialogoPrimero *,void *)' to 'unsigned long (__stdcall *)(void
*)'
Would you mind pass me an example without this error?? the solution is doing the function "static" but it have another problems.

Thank you in advance.

[weaknessforcats]

CreateThread requires that your thread functon is a ThreadProc.

A ThreadProc has this prototype:

[code= c]
DWORD WINAPI ThreadProc(LPVO ID);
[/code]

That means you can have any function for a thread but is must have this prototype. For example:

[code=c]
DWORD WINAPI MyFunction(LPVO ID date);
DWORD WINAPI ThresholdDetect or(LPVOID thedata);
[/code]

etc..

Then you can call CreateThread and use MyFunction or ThresholdDetect or as the thread argument.

[mccanaveras]

Thank you very much.

But my problem was the following one:

error C2664: 'CreateThread' : cannot convert parameter 3 from 'unsigned long (void *)' to 'unsigned long (__stdcall *)(void *)

I have to comunicate with a interface and I don't know how to do. I find it really difficult, although it musn't be so tricky.

Good day!!

CreateThread requires that your thread functon is a ThreadProc.

A ThreadProc has this prototype:

[code= c]
DWORD WINAPI ThreadProc(LPVO ID);
[/code]

That means you can have any function for a thread but is must have this prototype. For example:

[code=c]
DWORD WINAPI MyFunction(LPVO ID date);
DWORD WINAPI ThresholdDetect or(LPVOID thedata);
[/code]

etc..

Then you can call CreateThread and use MyFunction or ThresholdDetect or as the thread argument.

[gnanapoongothai]

Hi,
Can just breif out the problem. because i wil also be working with multithreding concepts in VC++ 6.0.Just new to the community ans VC++.