Initializing help system before first use

Procedures and functions

In general, the procedures and functions of mmsystem do not fail but set a status variable that can be read with getsysstat. To make sure the operation has been performed correctly, check the value of this variable after each system call.

Add a number of months to a date or datetime.
Compare 2 text strings ignoring case.
Copy a part of a text or string.
Cut a part of a text returning a copy of the deleted string.
Delete a part of a text.
Check whether a text or string ends with a given string.
Securely deletes the content of a text entity.
Expand a path or file name.
Copy a file.
Delete a file.
Search for files according to file name patterns.
Search for a string in a text or string.
Rename or move a file.
Create a text from a format string and its parameters.
Convert a date, time or datetime into a number.
Get a character in a string or text.
Get the current working directory.
Get the date part of a datetime.
Get the day number in the month of a date or datetime.
Get the day number in the year of a date or datetime.
Get the number of days of a month.
Get the directory separator of the running operating system.
Get the value of a control parameter.
Get and set endparse property of a parser context.
Get the value of an environment variable.
Get the size of a file.
Get the status of a file or directory.
Get time information of a file.
Get the hour part of a time or datetime.
Get the minute part of a time or datetime.
Get the month number of a date or datetime.
Get the millisecond part of a time or datetime.
Get the message associated to a system error code.
Get the system error code of the last command.
Get the path separator of the running operating system.
Get and set qtype property of a parser context.
Get the second part of a time or datetime.
Get and set sepchar property of a parser context.
Get the size of a text.
Get and set start property of a text area.
Get and set succ (position of successor character) property of a text area.
Get information about the running operating system.
Get the system status.
Get a time measure or the time part of a datetime.
Get the temporary directory as a text object.
Get and set trim property of a parser context.
Compute the day of the week for a date or datetime.
Get the year part of a date or datetime.
Paste a text or string into a text.
Check whether a date, time or datetime is valid.
Merge elements of a list or set into a text string.
Create a new directory in the given file system.
Create a new directory including its parents if necessary.
Create a Unix tar archive from a list of files.
Create a Zip archive from a list of files.
Advance to next field in a structured text string.
Start an external process for bidirectional communication.
Initialise an object of a module type from a text.
Convert a text into an integer.
Convert a text into a real.
Extract a text from a text.
Paste a text or string into a text.
Check whether a file name matches a given pattern.
Split a path into its components.
Sort a list or an array or (a subset of) the indices of an array.
Quote and encode a text string.
Get the value of a symbolic link.
Read a line of text from the current input stream.
Compare text strings using a regular expression.
Replace portions of a text string based on a regular expression.
Remove a directory.
Remove files selected using file name patterns.
Set a character in a text.
Set the date part of a datetime.
Set the day number of a date or datetime.
Set the value of a control parameter.
Set the value of an environment variable.
Set the hour part of a time or datetime.
Set the minute part of a time or datetime.
Set the month number of a date or datetime.
Set the millisecond part of a time or datetime.
Set the current system error code.
Set the second part of a time or datetime.
Set the time part of a datetime.
Set the year part of a date or datetime.
Suspend execution for a fixed amount of time.
Split a text string.
Check whether a text or string starts with a given string.
Create a symbolic link.
Execute an external program.
Get the list of files included in a Unix tar archive.
Create a formatted text from a string, a text or a number.
Generate the lowercase version of the provided text.
Generate the uppercase version of the provided text.
Remove blank characters at the beginning and/or end of a text string.
Extract files from a Unix tar archive.
Extract files from a Zip archive.
Get the list of files included in a Zip archive.