The Inter-thread operation is invalid: access the control from a thread that is not creating the control ~~~ Solution ~

The Inter-thread operation is invalid: It is never accessed by the thread that creates the control.
I heard that 2003 won't. I don't know if this is the case. I 've been using it for a long time ~
This problem may occur in 05, which seems to be for security ~
Oh, now we know two solutions ~

First:Control. checkforillegalcrossthreadcils= False;

When the thread starts, add this sentence. OK. No error is found ~
Everything can be used ~

Second:
With delegation, in 05, each control has an invokerequired attribute ~
Check whether it is true. If yes, the invoke operation is complete ~

 

// Create a delegate
Private   Delegate   String Returnstrdelegate ();

// The simplest drop-Value Method ~
Private   String Returnschool ()
{
ReturnCb_school.selectedvalue.tostring ();
}

// Determine whether to use invoke drops ~ If not, return directly. ~
Private   String Returncb (returnstrdelegate mydelegate)
{
If ( This . Invokerequired)
{
Return(String)This. Invoke (mydelegate );
}
Else
{
ReturnMydelegate ();
}
}

// Call other threads. ~
String _ School = Returncb (returnschool );

This is probably the case. It seems that I have heard that it is best not to use the first method. I don't know why ~
I have always used delegation, which is not very troublesome ~

Please give me a clear explanation. Thank you ~