convert WORD to char* and then char* to System::String

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C++

i have created following object of SYSTEMTIME which has attributes like wDay, wMinute, wHour etc which are WORD...

SYSTEMTIME s_t;

I want to print s_t.wDay or s_t.wHour in DataGridView column( i.e type System::String). So i get error like "cant convert WORD to System::String"
So i tried to convert
1)WORD to char* then
2)char* to System::String but doing some mistake..plz help

my code is
dataGridView1->Rows[0]->Cells[0]->Value=????? (here i want s_t.wDay )
i tried with _ultoa for conversion WORD to char*.. but dont know how to do that..