Multithreading

[J0llyGr33n]

Hey guys I am going to keep it short and sweet.

So I was switching all of my console tools to a GUI and everything was working fine until I attempted to implement Multithreading.

The error was:

(350): error C2664: '_beginthreadex' : cannot convert parameter 3 from 'void (__clrcall *)(void *)' to 'unsigned int (__stdcall *)(void *)'

According to MSDN I should be using __clrcall as I am in the call below --

				if(_beginthreadex(NULL, 0, CastLine, NULL, 0, &threadid1) == 0)
				{
					label7->Text = "0"; // move to MesageBox::show later.
				}

The CastLine function is:

void __clrcall CastLine(void *arg){
        HWND hWnd = FindWindowA(NULL, (LPCSTR)("World of Warcraft"));
	while(true)
	{
		PostMessageW(hWnd, WM_KEYDOWN, VK_F1, 0);
		PostMessageW(hWnd, WM_KEYUP, VK_F1, 0);
		Sleep(19000); //Sleeps for 19 seconds before casting again.
	}
}

As far as I can tell it looks right. Googlefu brought me to an old post from 2010
Missing definitions for _beginthreadex and _beginthread in process.h | Microsoft Connect
(considering its the version of VS10 I am using)

says no work around found -- only 3 useless post.

Best option i can think of is to find an old versions process.h

What do you guys think I should do?

[lanman92]

Change the function definition so it's no longer __clrcall. Change it to the proper type.

[J0llyGr33n]

Can't use __stdcall with /clr:ure

error C3641: 'CastLine' : invalid calling convention '__stdcall ' for function compiled with /clrure or /clr:safe

[sitnspinlock]

you can still use CreateThread with clr : pure.

what is your reasoning for using _beginthreadex?

[J0llyGr33n]

I thought that CreateThread was an __stdcall, thus not usable.

Testing now to check.

---------- Post added at 10:25 PM ---------- Previous post was at 10:16 PM ----------

Sorry for double post
//same function I use for my Console app

DWORD WINAPI CastLine(LPVOID arg)
{
	while(true)
	{
		HWND hWnd = FindWindowA(NULL, (LPCSTR)("World of Warcraft"));
		PostMessage(hWnd, WM_KEYDOWN, VK_F1, 0);
		PostMessage(hWnd, WM_KEYUP, VK_F1, 0);
		Sleep(19000);
	}
	return 0;
}

call

CreateThread(NULL, 0, CastLine, NULL, 0, &threadid1);

error

error C3641: 'CastLine' : invalid calling convention '__stdcall ' for function compiled with /clr:pure or /clr:safe
error C2664: 'CreateThread' : cannot convert parameter 3 from 'DWORD (__stdcall *)(LPVOID)' to 'LPTHREAD_START_ROUTINE'

[sitnspinlock]

so change it to just /clr? ;p

[J0llyGr33n]

Oh now I just feel silly! Thank you very much Everdox.