Mq4 file functions

Writes value of the float type from the current position of a file pointer into a binary file. Writes value of the int type from the current position of a file pointer into a binary file. Writes value of the long type from the current position of a file pointer into a binary file. Writes the contents of a structure passed as a parameter into a binary file, starting from the current position of the file pointer. Removes a selected directory.

If the folder is not empty, then it can't be removed. Opens file in the current history directory or in its subfolders. If the file is opened for writing using FileOpen , all subfolders specified in the path will be created if there are no such ones.

If the folder is not empty, then it can't be removed FolderClean Deletes all files in the specified folder FileOpenHistory Opens file in the current history directory or in its subfolders. File Functions This is a group of functions for working with files.

Below you can see a very simple example. First, there is an include file with a couple of functions, and then it is included in a script. When you compile Demo To understand it better, you can imagine that the compiler sees the following when the file above is compiled:. This should clarify what you can do with the include directive. Scripts to automatically harvest results are strictly prohibited due to performance reasons and will result in your IP being banned from this website.

Enter any file extension without dot e. MQ4 file extension - MetaQuotes Language 4 source code. What is mq4 file? How to open mq4 files? File type specification: Source code and script file type. Help how to open: MetaEditor can be used to open and edit. How to convert: It seems that. Displaying a text in the upper left corner of a chart window as a result of Comment execution.

The function plays a sound file. A set of recommended sound files can be found in the attachment - Sound Files. In some cases a program can be written to support a dialog with a user. Function MessageBox is used for this purpose. MessageBox function creates and displays a message box, it is also used to manage the dialog window.

A message box contains a message and header defined ina program, as well as any combination of predefined icons and push buttons. If a function is executed successfully, the returned value is one of the return code values of MessageBox. The function cannot be called from a custom indicator, because indicators are executed in the interface thread and may not decelerate it.

Parameters: text - a text containing a message to be displayed; caption - an optional text to be displayed in the message box. If the parameter is empty, an EA name will be displayed in the box header; flags - optional flags defining the type and behavior of the dialog box.

Flags can be a combination of flags from flag groups see MessageBox Return Codes. The EA supporting a dialog with a user dialogue. In the block WinUser During the whole period of EA execution a question about closing orders should be displayed only once. To trace whether the question has been already displayed in the EA 'Question' variable is declared.

At each start of the special function start block PlaySound is executed. The played tick. The decision about using sound in a program is made by a programmer. In some cases it is very useful to use sounds. For example, a sound may denote the fact of an EA execution. Other sounds may correspond to other events, for example triggering of a trading criterion, order closing, etc.

In the EA conditions, at which the message box must be displayed, are analyzed.