C / C++ / MFC

void HideWindows (HWND *pwnds, int nCount)
{
}

void HideWindows (HWND hWnd)
{
   HideWindows (&hWnd, 1);
}

void TaskbarOp(BOOL Add, BOOL Multiple, const int IfMultipleThenCount, const HWND *pWindows)
{
	CoInitialize(NULL);
	ITaskbarList *pDisp = NULL;
	CoCreateInstance( CLSID_TaskbarList, NULL, CLSCTX_SERVER, IID_ITaskbarList, (LPVOID *) &pDisp );

	if(Multiple)
	{
		for(int i = 0; i < IfMultipleThenCount; i++)
		{
			if(Add)
				pDisp->AddTab( pWindows[i] );
			else
				pDisp->DeleteTab( pWindows[i] );
		}
	}
	else
	{
		if(Add)
				pDisp->AddTab( pWindows );
			else
				pDisp->DeleteTab( pWindows );
	}

	pDisp->Release();
	CoUninitialize();
}

else
	{
		if(Add)
				pDisp->AddTab( pWindows ); // error
			else
				pDisp->DeleteTab( pWindows ); // error
	}

void TaskbarOp(BOOL Add, const int nCount, const HWND *pWindows)
{   
    ITaskbarList *pDisp = NULL; 
    CoCreateInstance( CLSID_TaskbarList, NULL, CLSCTX_SERVER, IID_ITaskbarList, (LPVOID *) &pDisp );
    
    for(int i = 0; i < IfMultipleThenCount; i++)        
    {           
        if(Add)             
            pDisp->AddTab( pWindows[i] );           
        else                
            pDisp->DeleteTab( pWindows[i] );        
    }   
    pDisp->Release();   
}

void TaskbarOp(BOOL Add, HWND hWnd)
{
    TaskbarOp(Add, 1, &hWnd);
}

DWORD dwValue = 25;

::RegSetValueEx(m_hKey, (LPCSTR)lpValueName, 0, REG_DWORD, (LPBYTE)&dwValue, sizeof(DWORD))

char* convert_char_modifier(char *Modifier)
{char* tmp = new char[strlen(Modifier)*2];
 char* Result = tmp;

 for (;*Modifier; Modifier++)
    {if (*Modifier >='A' && *Modifier <= 'Z')
        {*tmp++ = char((*Modifier - 'A')/10+'0');
         *tmp++ = char((*Modifier - 'A')%10+'1');
        }
     else
         *tmp++ = *Modifier;
    }

 *tmp = '\0';
 return Result;
}

int main(int argc, char* argv[])
{   char* Modifier = "A79867B987C98ZZ";
	printf("%s\n", convert_char_modifier(Modifier) ); // returns 01798670298703982626
	return 0;
}