Calling functions in c++

[JT JTM]

Hi,
i have a defined function, but when i run my program jumps the function without reading it. Here is how my code look like:

        void processComboItem(); declaring the function
 void TPosGetPaymentMethodForm::processComboItem()//details of the function
{
        int key = PosMainForm->PosTrnObj->PayKey;

        long double         FITotal = PosMainForm->PosTrnObj->FinalInvoiceTotal;
        long double         FIDue = PosMainForm->PosTrnObj->FinalInvoiceDue ;
        long double         FIVat = PosMainForm->PosTrnObj->FinalInvoiceVat;
        long double         FIDiscount = PosMainForm->PosTrnObj->FinalInvoiceDiscount ;
        double total = 0;

        AnsiString StockCode = "";
        AnsiString Slipnumber = PosMainForm->PosTrnObj->SlipNumber;
        double value = 0;
        PosDataForm->SelectQuery->Close();
        PosDataForm->SelectQuery->CommandText = "SELECT StockCode,Value,Quantity FROM POS_Transactions WHERE Slip = '" + AnsiReplaceStr( Slipnumber, "'", "`" ) + "' and Type = '02'";
        PosDataForm->SelectQuery->Open();
        if (PosDataForm->SelectQuery->RecordCount > 0)
        {
              StockCode = AnsiString(PosDataForm->SelectQuery->FieldValues["StockCode"]);
              value = double(PosDataForm->SelectQuery->FieldValues["Value"]);
              PosDataForm->SelectQuery->Close();
              PosDataForm->SelectQuery->CommandText = "SELECT IngredientID, Quantity FROM RECIPES WHERE KitchenItemID = '" + AnsiReplaceStr( StockCode.Trim(), "'", "`" ) + "'";
              PosDataForm->SelectQuery->Open();

              if (PosDataForm->SelectQuery->RecordCount > 0)
              {

                while(!PosDataForm->SelectQuery->Eof)
                {
                    PosMainForm->PosTrnObj->Search(AnsiString(PosDataForm->SelectQuery->FieldValues["IngredientID"]),"POSTerminal" );
                    PosDataForm->SelectQueryCents->Close();
                    PosDataForm->SelectQueryCents->CommandText = "SELECT Value FROM POS_Transactions WHERE Slip = '" + AnsiReplaceStr( Slipnumber, "'", "`" ) + "' and StockCode = '"+AnsiString(PosDataForm->SelectQuery->FieldValues["IngredientID"])+"'";
                    PosDataForm->SelectQueryCents->Open();

                    if (PosDataForm->SelectQueryCents->RecordCount > 0)
                    {
                          total += double(PosDataForm->SelectQueryCents->FieldValues["Value"]);
                    }

                    PosDataForm->SelectQuery->Next();
                }
              }

              total = value - total;
              PosDataForm->UpdateCommand->CommandText = "UPDATE POS_Transactions SET Value = "+AnsiString(total)+", Total = "+AnsiString(total)+" WHERE  Slip = '" + AnsiReplaceStr( Slipnumber, "'", "`" ) + "' and StockCode = '"+ StockCode +"'";
              PosDataForm->UpdateCommand->Execute();
        }
        //restore values
        PosMainForm->PosTrnObj->FinalInvoiceTotal = FITotal;
        PosMainForm->PosTrnObj->FinalInvoiceDue = FIDue;
        PosMainForm->PosTrnObj->FinalInvoiceVat=FIVat;
        PosMainForm->PosTrnObj->FinalInvoiceDiscount=FIDiscount;
        PosMainForm->PosTrnObj->PayKey = key;

} 

//calling the function
void __fastcall TPosGetPaymentMethodForm::Button19Click(TObject *Sender)
{
        processComboItem();
        PosPaymentReceivedKeyPress(this, 'n');
}

when i run my application it doesn't go through the calling it skips that part.
can anyone help?

[weaknessforcats]

Have you walked this code through your debugger?

Are you even calling this function:

void __fastcall TPosGetPaymentMethodForm::Button19Click(TObject *Sender)
 {

?
BTW: TPosGetPaymentM ethodForm::Butt on19Click does not use its argument.