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Api call from Com

Posted on 2002-03-28
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Last Modified: 2010-05-18
I want to refer an .ini file through an API. The API is called from the COM object. When the COM calls the API, the API should refer this ini file.
     In windows 2000 server environment, when i access this API through the dll, the API refers the ini file only if it available in winnt/system32 directory. It is not referring the ini file eventhough it is present in the directory where the APIs are.
     But i need to tell the COM to access the ini file from the directory where the APIs are and not the ini file from the winnt/system32 directory. Please give solution.
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Question by:krishnaveni_a
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Expert Comment

by:mariab_
ID: 6902181
Which exactly API function do you use?
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Accepted Solution

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Éric Moreau earned 50 total points
ID: 6902197
use this API to read from any INI file:

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
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Author Comment

by:krishnaveni_a
ID: 6904380
Actually we are having the API which was created by somebody.
But we are having the sample API application. In this, we are using the "GetPrivateProfileString" function  to read ini file as you mentioned above. Here we are passing the value of the argument namely "Filename" as app.path & "/Readme.ini". And API is in separate location not in system directory. But we are having the ini file in both directories such as Direcotry where the API resides and System directory.

We are calling the function which is in API from our own COM. Now it reads the Readme.ini which is in only System directory not in the directory where our API resides.

We are doubted that is there any diffence while calling the API function from COM and calling from the normal application?.



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Expert Comment

by:mariab_
ID: 6904630
there is no difference between calling the API from COM or else where.

to access file other than the windows directory, you have to specify it with the full path name.

Quote:

"lpFileName
[in] Pointer to a null-terminated string that specifies the name of the initialization file. If this parameter does not contain a full path to the file, the system searches for the file in the Windows directory. "
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Expert Comment

by:Éric Moreau
ID: 6904937
this is because the App.Path from the COM object is different from App.Path value of the EXE. Can you pass the full path from your EXE to your COM?
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Author Comment

by:krishnaveni_a
ID: 6906415
is there any other way rather than passing the fullpath
from the COM to API.?
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Expert Comment

by:Éric Moreau
ID: 6906828
run the DLL from the same folder as your application is another method (but I prefer passing the full path).
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by:Moondancer
ID: 6978588
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Expert Comment

by:Éric Moreau
ID: 6979082
points to me!
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by:Moondancer
ID: 6979285
Finalized!
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