# GetTextBoxLineIndexFromOffset

int GetTextBoxLineIndexFromOffset (int panelHandle, int controlID, int byteOffset, int *lineNumber);

## Purpose

For the specified text box control, returns the zero-based index of the line that contains the character at byteOffset bytes beyond the beginning of the text.

## Parameters

Input
Name | Type | Description
panelHandle | integer | Specifier for a particular panel that is currently in memory. You obtain this handle from LoadPanel, NewPanel, or DuplicatePanel.
controlID | integer | The defined constant, located in the .uir header file, that you assigned to the control in the User Interface Editor, or the ID returned by NewCtrl or DuplicateCtrl.
byteOffset | integer | Number of bytes beyond the beginning of the text currently contained in the text box, including any embedded newline characters. Must be greater than or equal to zero.
Output
Name | Type | Description
lineNumber | integer | Returns the zero-based index of the line containing the character that is byteOffset bytes beyond the beginning of the text. If byteOffset exceeds the number of bytes in the text, the function returns the number of lines in the text box.

## Return Value

Name | Type | Description
status | integer | Return value indicating whether the function was successful. A negative number indicates that an error occurred.
Code | Error Message String
xx | Success