Making Thread-Safe Calls to labels in Windows Forms Controls - multithreading

Question

I am making a small app in Visual C++ in Microsoft Visual Studio where I am collecting data in a thread and displaying the information in labels in a Windows Form. I am trying to follow this Article/Tutorial on how to make the calls to the labels thread safe: http://msdn.microsoft.com/en-us/library/ms171728(VS.90).aspx. The example shows how to output text to one text box, but I want to output to many labels. When I try I get the error:
error C3352: 'void APP::Form1::SetText(System::String ^,System::Windows::Forms::Label ^)' : the specified function does not match the delegate type 'void (System::String ^)'
Here is some of the code I am using:
private:
void ThreadProc()
{
while(!exit)
{
uInt8 data[100];
//code to get data
SetText(data[0].ToString(), label1);
SetText(data[1].ToString(), label2);
SetText(data[2].ToString(), label3);
SetText(data[3].ToString(), label4);
SetText(data[4].ToString(), label5);
SetText(data[5].ToString(), label6);
...
}
}
delegate void SetTextDelegate(String^ text);
private:
void SetText(String^ text, Label^ label)
{
// InvokeRequired required compares the thread ID of the
// calling thread to the thread ID of the creating thread.
// If these threads are different, it returns true.
if (label->InvokeRequired)
{
SetTextDelegate^ d =
gcnew SetTextDelegate(this, &Form1::SetText);
this->Invoke(d, gcnew array<Object^> { text });
}
else
{
label->Text = text;
}
}

Answer 1

You need to modify the delegate to take a Label in addition to the string:
delegate void SetTextDelegate(String^ text, Label^ label);
And then call it with two parameters:
void SetText(String^ text, Label^ label)
{
// InvokeRequired required compares the thread ID of the
// calling thread to the thread ID of the creating thread.
// If these threads are different, it returns true.
if (label->InvokeRequired)
{
SetTextDelegate^ d =
gcnew SetTextDelegate(this, &Form1::SetText);
this->Invoke(d, gcnew array<Object^> { text, label });
}
else
{
label->;Text = text;
}
}