Newbie: About passing parameter into a form

I have the following code, and I want to pass the variable test1 into the form, so that the form can read my test1 value. The var will be passed to SetParameter, a method under Form1. But I've encounted the following problem:

error C2664: 'void System::Windows::Forms::TextBox::set_Text(System::String __gc *)' : cannot convert parameter 1 from 'int' to 'System::String __gc *'

error C2039: 'SetParameter' : is not a member of 'System::Windows::Forms::Form'

Form1.cpp main:

Code:

int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
int test1;
string line;
System::Threading::Thread::CurrentThread->ApartmentState = System::Threading::ApartmentState::STA;
ifstream iFile("test.txt");

if (!iFile)
{
//error msg
return -1;
}

iFile >> test1;

iFile.close();

Form *Form1 = new Form();

Form1->SetParameter(test1); //put parameter into form

Application::Run(Form1); //run app
return 0;
}

Form1.h:

Code:

public __gc class Form1 : public System::Windows::Forms::Form
{
public:
Form1()
{
InitializeComponent();
}

void SetParameter(int t){
textBox1->Text = t;
}

protected:
void Dispose(Boolean disposing)......
.....
.....
.....

Actually I dunno where should I put the SetParameter, and how to convert int "t" to __gc textbox text as shown in the method.(since compiling the method results the first error)

Million thanks again.

 

then, how could I change it in order to let the outside main see the SetParameter method and use it? thanks.

 

OK now, thanks a lot!