Managed C++/CLI

ChkItm1 = String::Empty;
//Now NVarchar Field - supplier_name contains Arabic & English strings.. So how to compare it?
String^ ChkItm1=String::Empty;
String^ KyPrs1=String::Empty;

ChkItm1 = MyGlobalData::PartyTbl->Rows[N7]["supplier_name"]->ToString();

//Naomi = ChkItm1->StartsWith(MyGlobalData::KyPrs1);
//if (Naomi == true) {

//The below line not working well...I don't how to put 'N' for unicode comparision..
if 'N'???????? (ChkItm1->Trim()->Substring(0, MyGlobalData::KyPrs1->Trim()->Length)=='N'????????

MyGlobalData::KyPrs1->Trim()) {
blah...blah...blah...
}

//MyProject_Datas.h 
public ref class MyUsefulDatas 
{ 
	blah...blah...blah... 
	public: static System::Void Item_Name( System::Object^ Sender, System::Windows::Forms::KeyEventArgs^ e) { 
	blah...blah...blah... 
	} 
	public: static System::Void Party_Name( System::Object^ Sender, System::Windows::Forms::KeyEventArgs^ e) { 
	blah...blah...blah... 
	} 
}; 

textBox2->KeyDown += gcnew KeyEventHandler(MyUsefulDatas, &MyUsefulDatas::Party_Name); ???????? 

textBox2->KeyDown += delegate { .....???????? }

bool IsPrinterOk(String ^printerName)
{
    bool bResult=false;
    HANDLE hPrinter;


    IntPtr pPrinterName=Marshal::StringToHGlobalUni(printerName);
    WCHAR *pChar=(WCHAR *)pPrinterName.ToPointer();

    if(::OpenPrinter(pChar,&hPrinter,NULL)==0)
        return false;

    DWORD bytesNeeded;
    ::GetPrinter(hPrinter,2,0,0,&bytesNeeded);
    PRINTER_INFO_2 *pf=(PRINTER_INFO_2 *)GlobalAlloc(GPTR,bytesNeeded);

    if(::GetPrinter(hPrinter,2,(LPBYTE)pf,bytesNeeded,&bytesNeeded)!=0)
        if(pf->cJobs==0 && pf->Status==0)
            bResult=true;

    GlobalFree(pf);

    ClosePrinter(hPrinter);

    return bResult;
}

public class MyDataGrid : DataGridView 
{
     // FOR ENTER KEY PROCESS WITH DATAGRIDVIEW
        protected override bool ProcessDialogKey(Keys keyData)
        {
            Keys key = keyData & Keys.KeyCode;
            if (key == Keys.Enter)
            {
                base.OnKeyDown(new KeyEventArgs(keyData));
                return true;
            }
            else
            {
                return base.ProcessDialogKey(keyData);
            }
        }
        //Class End
}

#include "stdafx.h"
#include "MyMainForm.h"
blah...blah...blah...blah..

Application::Run(gcnew MyMainForm());

From the bove line it shows error C2061: Syntax error : Identifier 'MyMainForm'