fGraphicFilter (Example)

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Opening a selected file
The following code is used to open a file. This file is an image file or a text file. This file is selected by fSelect.

// Declare the variables
FileNameAndPath is string
ListImageFiles is string
FileID is int

// Retrieve the list of image formats supported by WINDEV
ListImageFiles = fGraphicFilter()

// Select file to open
FileNameAndPath = fSelect("", "File.txt", "Select a file", ...
ListImageFiles + CR + "Text file (*.TXT)" + TAB + "*.txt", "TXT", ...
fselOpen + fselExist)

// Open file
FileID = fOpen(FileNameAndPath, foReadWrite)
// Display an error message if the opening was not performed
IF FileID = -1 THEN
Error(ErrorInfo(errMessage))
ELSE
// Processes in the opened file
...
// End of processes
END