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Tip of the Day
Language: Visual Basic
Expertise: Beginner
Aug 6, 1997

Handling Long INI File Entries

INI file entries can be so extremely long that the normal way of sizing a string before retrieving the entry may not be sufficient. This most frequently is true when retrieving the keyword names for an entire INI file section. Many programmers code something like this:
 IniEntry = Space$(512) ' let's hope 512 is big enough

Result = GetProfileString(Section, _
	KeyWord, "", IniEntry, Len(IniEntry))
If Result > 0 Then
		IniEntry = Left$(IniEntry, Result)
However, there is no indication that the returned string may have been truncated. This technique will accommodate any length INI string:
 IniEntry = ""
Do
	IniEntry = IniEntry + Space$(512)
	Result = GetProfileString(Section, _
		KeyWord, "", IniEntry, Len(IniEntry))
Loop Until Right$(IniEntry, 1) = " "
If IniEntry is not long enough, the rightmost character will contain a null character, so the loop will repeat until the rightmost character remains as a space. The same technique works when retrieving all keywords of a section like this:
 KeyWords = ""
Do
	KeyWords = KeyWords + Space$(512)
	Result = GetProfileString(Section, 0, "", _ 
		KeyWords, Len(KeyWords))
Loop Until Right$(KeyWords, 1) = " "
This assumes that the "KeyWord" parameter for GetProfileString has been declared as:
 
ByVal lpKeyWord As Any
Phil Parsons
 
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