Question with GetPrivateProfileString

[AndyK]

I use it to retrieve value from .ini file but when on Form_load it reads the value, then it delete it so basically all the data from .ini file will be lost if I'll open then close my program and a second later open it again.. I read from INI when form loads and write to it when for unloads, but how can I prevent data (that was read from ini) from being deleted, I just want to read from INI and leave INI alone, but on form unload it will just overwrite existed value, without losing any data from INI

Thank You

[Aaron Young]

GetPrivateProfileString doesn't delete value that it reads, you must be resetting/passing blank values to the WritePrivateProfileString API, check the Values you are passing to this API in your Forms Unload Event.

Aaron Young
Analyst Programmer
ajyoung@pressenter.com
aarony@redwingsoftware.com

[AndyK]

But how can I fix the code so data inside .ini will remain after GetPrivateProfileString was used

[Chris Eastwood]

Like Aaron said, the GetPrivateProfileString doesn't remove items from your ini file - Are you sure that something else isn't removing them (Notepad etc ?)

Try it with this simple form :


option Explicit
'
private Declare Function GetPrivateProfileString Lib "kernel32" _
Alias "GetPrivateProfileStringA" (byval lpApplicationName as string, _
byval lpKeyName as Any, byval lpDefault as string, _
byval lpReturnedString as string, byval nSize as Long, _
byval lpFileName as string) as Long
'
private Sub Form_Load()
Dim sBuffer as string
Dim lRet as Long
Dim lSize as Long
'
lSize = 255
sBuffer = string$(lSize, vbNullChar)
lRet = GetPrivateProfileString("me", "TEST", "empty !", sBuffer, _
lSize, "c:\test.ini")
If lRet > 0 then MsgBox Left$(sBuffer, lRet)
'
End Sub




And this ini file in c:\test.ini :

[ME]
TEST=Chris Was Here

- run the program and then close the form - you should see that the ini file hasn't been changed once the program has finished.


Chris Eastwood

CodeGuru - the website for developers
http://codeguru.developer.com/vb