The MQMailFormFieldData structure describes the data in a form field.
typedef union MQMailFormFieldData_tag
{
BOOL b; //Specifies MQMailFormField_BOOL.
LPSTR lpsz; //Specifies MQMailFormField_STRING.
LONG l //Specifies MQMailFormField_LONG.
CY cy //Specifies MQMailFormField_CURRENCY.
double dbl //Specifies MQMailFormField_DOUBLE.
} MQMailFormFieldData, FAR*LPMQMailFormFieldData;