DLL API Help

[ShelbySue]

I am trying to access some dll functions that require a structure be populated and then returns the results in the same structure.

I am looking for help in the following places. I am not attempting to get anyone to do this for me, I just need help getting off dead-center:

1. What is the best "substitute" for a structure. A string? An Array?

2. I can call the RtlMoveMemory from kernel.dll, but need to be able to copy bytes starting at an offset from the start of the structure. ( ie ->destination + 4, for 4 bytes)

;Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _

; (Destination As Any, Source As Any, ByVal Length As Long)

Again, I am not asking anyone to create this for, just help with how to simulate a structure and then access the data within the simulation.

However, to aid in your discussion, here is one of the functions I am attempting to call.

DWORD RasSetEntryDialParams(

LPTSTR lpszPhonebook,

// pointer to the full path and filename of the phonebook file

LPRASDIALPARAMS lprasdialparams,

// pointer to a structure with the new connection parameters

BOOL fRemovePassword

// indicates whether to remove password from entrys parameters );

typedef struct tagRASDIALPARAMSA {

DWORD dwSize;

CHAR szEntryName[RAS_MaxEntryName + 1];

CHAR szPhoneNumber[RAS_MaxPhoneNumber + 1];

CHAR szCallbackNumber[RAS_MaxCallbackNumber + 1];

CHAR szUserName[uNLEN + 1];

CHAR szPassword[PWLEN + 1];

CHAR szDomain[DNLEN + 1];

#if (WINVER >= 0x401)

DWORD dwSubEntry;

ULONG_PTR dwCallbackId;

#endif

} RASDIALPARAMSA, *LPRASDIALPARAMSA;

EDI: Or if any of you gurus want to wrap this into a cleaner dll that I can access the individual parameters?

Edited April 8, 2005 by ShelbySue

[Ejoc]

Dunno how you would build it in AutoIt, but you could make a dll wrapper for it using C/C++....

Write a function thats takes a bunch of strings, builds the struct calls the real dll functions, and destructs the returned struct back into strings.

[kjactive]

Well I don't know if this is what you'r getting at but to do a structure to a library call is done in this manner... the ending _ character is a kind of new line char...

$var = DllCall(library,hwnd,Func to call in library,_

"hwnd",value,_

"int",value,_

"int",value )

The Hwnd & Int etc. is keywords that indicate to Autoit what to expect, well you can look these up else where - This would be how you normally insert a structure into a dll library call...

Kåre

Edited April 8, 2005 by kjactive