dataGridView textBox Numerique

J'ai trouvé comment faire voici la solution

Code:

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private: System::Void DataGridView_CellValidating(System::Object^  sender, System::Windows::Forms::DataGridViewCellValidatingEventArgs^  e) 
		 {
			 int newInteger;
			 DataGridView ^DGV = safe_cast<DataGridView^>(sender);
			 if (DGV->Rows[e->RowIndex]->IsNewRow) 
			 {
				 return; 
			 }
			 if (!Int32::TryParse(e->FormattedValue->ToString(),newInteger) || (newInteger < 0))
				{
				    e->Cancel = true;
				}
		 }