Adds a prompt field to the current form. You should call this function only after the FormNew() function and before the FormRead() function.
FormPrompt(Col, Row, Prompt)
The number of the column in which the prompt will be placed. Enter a number from 0 (column 1) to the form width - 1. For example, to place the prompt in column 8, enter 7.
The number of the row in which the prompt will be placed. Enter a number from 0 (row 1) to the form height - 1. For example, to place the prompt in row 6, enter 5.
The prompt string.
The field handle if it is added successfully, otherwise -1 is returned.