sleep thead and wait WndProc message

[makifsar]

I am using a comserver to communicate remote equipments. This server gives response via WndProc. First I call READ function to start communication and remote equipment gives response this via WndProc. Mw request is, I want to
sleep READ thead and after taking right message from WndProc, wake up this thead return this value to main thead. I am trying some methods using delagate but I can not achive it.

My Program like this

Public Void CHECK()
{

for (int y=0;y<100;y++)
{
received[y]=READ(1,1,y);

}
}

public string READ(string Adress,int Menu,int Parameter)
{

CommsInterface.ReadObject(UserId, Adress, ref ReadParameterObject));

//have to finish WndProc
return xx; // return data from WndProc
}

protected override void WndProc(ref Message m)
{
// WM_MUA=0x0401
if (m.Msg == WM_MUA)
{
//some routines

}
}