DllCall to my dll function returning structure is not working.
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By IndianSage
Hi,
My AutoIt script is as folllows:
;use for calling function add2NosA in dll ;Local $vNo1 = 33 ;Local $vNo2 = 11 ;use for calling function sortNos in dll Local $vNo1 = [11,7,9] Local $vNo2 = [1,3,2] ; _ArrayDisplay($vNo1, "vNo1 display") ; _ArrayDisplay($vNo2, "vNo2 display") ;Local $hWnd = DllOpen("E:\CV-Dell-1\autoit3\myComObj1.dll") Local $hWnd = ObjCreate("myComObj1.clsMath") if (@error) Then MsgBox (0, "Error", "Error1 = " & @error) Exit EndIf ;function call method - DllCall with function name ;Local $aRes = DllCall($hWnd, "int", "addNosA", "int", $vNo1, "int", $vNo2) ;Local $aRes = DllCall($hWnd, "Ptr", "sortNos", "Array", $vNo1, "Array", $vNo2) ;function call method - $hWnd.<function name> ;Local $aRes = $hWnd.add2NosA($vNo1, $vNo2) ; this works fine with ObjCreate Local $aRes = $hWnd.sortNos($vNo1, $vNo2) if (@error) Then MsgBox (0, "Error", "Error2 = " & @error) DllClose($hWnd) Exit EndIf ;use appropriate msgbox ;MsgBox(0,"Result", "Result = " & $vNo1[0]) MsgBox(0,"Result", "Result = " & $aRes) _ArrayDisplay($vNo1, "vNo1 display") _ArrayDisplay($aRes , "aRes display") DllClose($hWnd) My VB.Net - ClassLibrary - Dll - COM obj is as follows - has 2 functions - add2NosA and sortNos:
<ComClass(clsMath.ClassId, clsMath.InterfaceId, clsMath.EventsId)> Public Class clsMath Public Const ClassId As String = "3A42F85E-24C8-4BAA-91B5-AE56C4683C13" Public Const InterfaceId As String = "D99D7C79-2BA7-4A33-B7BC-9B7F19FDF828" Public Const EventsId As String = "CA128AC4-580C-4112-9EAD-8D1599E3F37A" Public Sub New() MyBase.New() End Sub Public Function add2NosA(ByVal no1 As Integer, ByVal no2 As Integer) As Integer Return (no1 + no2) End Function Public Sub sortNos(ByRef no1 As Array, ByRef no2 As Array) Array.Sort(no1) no2 = no1 End Sub End Class Over all I tried various 8 options mentioned in the attached Excel file - with only 1 combination working.
Overall could not make Array returned capture in AutoIt script.
Can someone help please?
Thanks in advance.
Options-Tried-Matrix-Results.xlsx
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By xYuri
This simple dllcall gives me error 5, access denied,
Func _WinAPI_VkKeyScan($__key) _WinAPI_SetLastError(0) $res = DllCall('User32.dll', 'SHORT', 'VkKeyScan', 'CHAR', $__key) _xConsole('res: '&$res) $_LastErr = _WinAPI_GetLastError() If $_LastErr <> 0 Then _xConsole('Err: {' & $_LastErr & '}> ' & _WinAPI_GetLastErrorMessage()) Return $res EndFunc Am i doing something wrong?
Also tried VkKeyScanA and W
Edit:
I want to send `:` via PostMessage() WM_KEYDOWN
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By Skysnake
This is relevant
From here https://stackoverflow.com/questions/3454315/is-it-possible-to-pin-a-dll-in-memory-to-prevent-unloading
I use several UDFs on the Forum to do various things. Those UDFs work very well.
Effectively the UDFs are DLL wrappers, that make it possible to access DLL functions easily without the long hard slog of DLLCall() every time.
However, I have now run into the issue that multiple UDF DLLCalls are slow. Not mind numbingly slow, but slow enough to become noticeable with a large of repeated function calls.
So I was wondering, is it possible to "load a DLL into memory" and leave it there for the duration of my script's lifetime, avoid repeated DLL on-disk reads with a persistent in memory DLL?
From Microsoft
https://docs.microsoft.com/en-us/windows/desktop/dlls/about-dynamic-link-libraries
Looks like what I want to do is: load-time dynamic linking,
So next question, (a) how do I do this with AutoIt (b) How would this impact on standard AutoIt type DLL calls?
The point is speed. Is there a different approach?
Or am I barking up the wrong tree?
Skysnake
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By supersonic
Hi -
Currently I'm playing around with Windows Credential Manager. I'm trying to access it with DllCall("advapi32.dll", ...) using the functions 'CredWriteW', 'CredReadW' and 'CredDeleteW'. All well. Another function I have to deal with is 'CredEnumerateW': https://docs.microsoft.com/en-us/windows/desktop/api/wincred/nf-wincred-credenumeratew/ .
That's the test code I have so far:
#include <Array.au3> #include <String.au3> Local $tCredentialsCount = DllStructCreate("DWORD;") Local $tPointerToArrayOfPointers = DllStructCreate("PTR;") ; Local $tPointerToArrayOfPointers = DllStructCreate(_StringRepeat("PTR;", 200)) ; ??? Local $aResult = DllCall("advapi32.dll", "BOOL", "CredEnumerateW", _ "WSTR", Null, "DWORD", 1, "DWORD", DllStructGetPtr($tCredentialsCount), "PTR", DllStructGetPtr($tPointerToArrayOfPointers)) If (Not @error) Then Local $iCredentialsCount = DllStructGetData($tCredentialsCount, 1) _ArrayDisplay($aResult, $iCredentialsCount) Local $hPointerToArrayOfPointers = DllStructGetData($tPointerToArrayOfPointers, 1) MsgBox(0, "$hPointerToArrayOfPointers", $hPointerToArrayOfPointers) ; Fails... For $i = 1 To 10 ; $iCredentialsCount MsgBox(0, $i & "___" & (($i * 2) - 1), DllStructGetData($tPointerToArrayOfPointers, ($i * 2) - 1)) Next $tCredentialsCount = 0 $tPointerToArrayOfPointers = 0 DllCall("advapi32.dll", "NONE", "CredFreeW", "PTR", $hPointerToArrayOfPointers) EndIf The DllCall seems to function properly - I get a valid count of credentials (on my computer ~ 133) and a pointer "to array of pointers".
What is meant by "array of pointers"?
Microsoft says: Pointer to an array of pointers to credentials. The returned credential is a single allocated block. Any pointers contained within the buffer are pointers to locations within this single allocated block.
How to access these pointers... Contained within the buffer???
Any information you can provide me would be greatly appreciated.
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By bladem2003
Hello,
i need help to translate the c code to autoit .
I don't understand the callback function.
#include <windows.h> #include <stdio.h> // native IR Data by PAnsiChar typedef void CALLBACK CallBackPAnsiChar(char*, char*, char*, char*); typedef int (__stdcall *impInitPAnsiChar)(CallBackPAnsiChar); CALLBACK MyCallBackPAnsiChar(char* Protocol, char* Address, char* Command, char* Flags) { printf("\nIR Data received: Protocol: %s, Address: 0x%s, Command: 0x%s, Flags: 0x%s", Protocol, Address, Command, Flags); fflush(stdout); } int main(int argc, char **argv) { impInitPAnsiChar InitPAnsiChar = NULL; // Load DLL file HINSTANCE hinstLib = LoadLibrary(TEXT("USB_IR_Remote_Receiver.dll")); if (hinstLib == NULL) { printf("\nERROR: unable to load DLL\n"); return 1; } // Get function pointer InitPAnsiChar InitPAnsiChar = (impInitPAnsiChar)GetProcAddress(hinstLib, "InitPAnsiChar"); if (InitPAnsiChar == NULL) { printf("\nERROR: unable to find DLL function\n"); FreeLibrary(hinstLib); return 1; } if (InitPAnsiChar(*MyCallBackPAnsiChar)) { printf("\nInit DLL with InitPAnsiChar successfull"); } else { // Unload DLL file FreeLibrary(hinstLib); return 0; } while(1) { } //return 0; }
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