Language Elements and Reference:xpplrm
Operations with memos Foundation
Values of the "memo" data type can exist only in files, which means that only field variables can contain memos. When a field variable with the "memo" data type is assigned to a memory variable, the memory variable has the "character" data type. All operations performed on variables with the "character" data type may also be used with variables of the "memo" data type. The "memo" data type is used for field variables that store character strings of variable lengths. Special functions for processing memos are shown in the following table:
Functions for memos and character values:
| Function | Description |
|---|---|
| HardCR() | Replaces "soft" return with "hard" return |
| MemoEdit() | Edits memo field or text |
| MemoLine() | Extracts line from text |
| MemoRead() | Reads ASCII file |
| MemoTran() | Replaces "soft" and "hard" return |
| MemoWrit() | Writes text to ASCII file |
| MlCount() | Determines number of lines in text |
| MlCtoPos() | Determines absolute position of a character in text |
| MlPos() | Determines start position of a line in text |
| MPostoLc() | Determines relative row and column position from absolute position |
Memos are character strings that can be formatted as text. The formatting is done using special characters, like tabs and carriage returns. These are non-printable characters contained in the character string, text, or memo. The tab is the ASCII character 9 (Chr(9)) and a carriage return consists of the two ASCII characters 13 and 10 (Chr(13) + Chr(10)). The memo functions consider these special characters for formatting text. There are two types of carriage returns: the "hard" and the "soft". The "hard" return consists of the two ASCII characters 13 and 10 (Chr(13)+Chr(10)). The "soft" return consists of the ASCII characters 141 and 10 (Chr(141)+Chr(10)). The "soft" return is automatically inserted into text when it is processed using MemoEdit().
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