i hope someone can help me out with this
i don't kmow how to write the line below in masm
CONAGetDevices is a function inside dll
loaded with LoadLibrary and GetProcAddress
c++ syntax:
// Get list of currently connected devices
pDevices = new CONAPI_DEVICE[dwDeviceCount];
CONAGetDevices(hDMHandle, &dwDeviceCount, pDevices);
masm try:
CD CONAPI_DEVICE <>
push offset CD ; offset struct
push iCount ; 1
push phDMHandle ; handle from CONAOpenDM function
call _CONAGetDevices
eax returns 80100012 (ECONA_INVALID_POINTER)
pop eax
pop eax
pop eax
the handle from CONAOpenDM is correct
because CONAGetDeviceCount is returning ok
CONAPI_DEVICE and Connection_info are C++ struct's
// Device info structure
typedef struct
{
WCHAR* pstrSerialNumber;
WCHAR* pstrFriendlyName;
WCHAR* pstrModel;
WCHAR* pstrManufacturer;
DWORD dwNumberOfItems;
CONAPI_CONNECTION_INFO* pItems;
} CONAPI_DEVICE;
// Connection_info structure
typedef struct
{
DWORD dwDeviceID;
DWORD dwMedia;
WCHAR* pstrDeviceName;
WCHAR* pstrAddress;
DWORD dwState;
} CONAPI_CONNECTION_INFO;
i hoop i converted it right to masm syntax
CONAPI_DEVICE struct
pstrSerialNumber dd ?
pstrFriendlyName dd ?
pstrModel dd ?
pstrManufacturer dd ?
dwNumberOfItems dd ?
pItems dd ?
CONAPI_DEVICE ends
CONAPI_CONNECTION_INFO struct
dwDeviceID dd ?
dwMedia dd ?
pstrDeviceName dd ?
pstrAddress dd ?
dwState dd ?
CONAPI_CONNECTION_INFO ends
translate correct , but it was useless to do it
Quote
; Device info structure
CONAPI_DEVICE STRUCT
pstrSerialNumber DWORD ?
pstrFriendlyName DWORD ?
pstrModel DWORD ?
pstrManufacturer DWORD ?
dwNumberOfItems DWORD ?
pItems DWORD ?
CONAPI_DEVICE ENDS
; Connection_info structure
CONAPI_CONNECTION_INFO STRUCT
dwDeviceID DWORD ?
dwMedia DWORD ?
pstrDeviceName DWORD ?
pstrAddress DWORD ?
dwState DWORD ?
CONAPI_CONNECTION_INFO ENDS
result given by http://www.masm32.com/board/index.php?topic=5428.0
the "*" means it is a pointer, if i remember C correctly
so, yes - it is a dword in 32 bit code
the prefix "pstr" means it is a pointer to a string
so - these are addresses
Thanks people
But if the struct's are correct,
how to deal with this C++ command ?
pDevices = new CONAPI_DEVICE[dwDeviceCount];
It looks like pDevices = pointer to Struct
i have try'ed many different inputs, like a pointer of a pointer, array of struct's and even memmory buffer
nothing is working, still the same error invalid pointer
Quote from: jpam on January 02, 2011, 07:51:57 PMhow to deal with this C++ command ?
pDevices = new CONAPI_DEVICE[dwDeviceCount];
should be:
mov eax,dwDeviceCount
imul eax,eax,SIZEOF CONAPI_DEVICE
mov pDevices,alloc(eax)qWord
Not phDMAHandle?
CONAOpenDM
mov hDMHandle,eax
..
push hDMHandle ; handle from CONAOpenDM function
..
mov eax,dwDeviceCount
imul eax,eax,SIZEOF CONAPI_DEVICE
mov pDevices,alloc(eax)
Pointer to allocated memory
allready try that, error 80100012 (ECONA_INVALID_POINTER)
i got a brain dammage from this :dazzled:
any ideas left ::)
@clive
current code;
invoke GetProcessHeap
mov hHeap,eax
mov eax,iCount
imul eax,eax,SIZEOF CONAPI_DEVICE
invoke HeapAlloc,hHeap,HEAP_ZERO_MEMORY,eax
mov pMem,eax
mov pDevices,eax
push pDevices
push iCount
push phDMHandle
call _CONAGetDevices
PrintHex eax,"_CONAGetDevices"
pop eax
pop eax
pop eax
Try getting the compiler to generate code for you to look at. Use -FAcs or check the compiler options.
// Parameters:
// hDMHandle [in] Device manager handle
// pdwCount [in,out] In: Number of allocated CONAPI_DEVICE structs.
// Out: Number of used CONAPI_DEVICE structs.
// pDevices [out] Pointer to receiving CONAPI_DEVICE structures.
pdwCount is a pointer to a dword that holds the number of structures on input
and receives the number of used structures on output
you are passing the count, instead
dedndave you are right !
aarch !, bad manual reading from me :(
when i pass the pointer of the dword its working !
many thanks all you people for helping me !
:U