Hello, You would have to write a kernel mode stub driver that mapped the hardware address space into user mode space. Then you can read and write directly to the hardware from the DLL. See: ZwMapViewOfSection As I recall, there is an example driver "MapMem" (or some such thing) in the DDK source. Thank you, David A. Hoatson ----- Original Message ----- From: "Victor V Lyamtsev" <vvl@xxxxxxxxxxxxx> To: <wdmaudiodev@xxxxxxxxxxxxx> Sent: Tuesday, November 04, 2003 7:29 AM Subject: [wdmaudiodev] build problem > I wonder if code with I/O space read and write macros ( like > READ_PORT_ULONG ) can be built into dll; > I saw DDK examples where it was built into static lib, but all my attempts > to build it into dll resulted in > "Macro redefinition" errors. Can it be done? > > SOURCES > > TARGETNAME=testdll > TARGETTYPE=DYNLINK > TARGETPATH=obj > TARGETEXT=dll > DLLENTRY=LibMain > > C_DEFINES= $(C_DEFINES) -D_WIN32 -DUNICODE -D_UNICODE -DUNDER_NT > > LINKER_FLAGS=-map > > INCLUDES= \ > ..\inc; \ > $(DDK_INC_PATH); \ > $(WDM_INC_PATH); > > MSC_WARNING_LEVEL=-W3 -WX > > SOURCES=\ > testdll.c\ > > /////////////////////////////////////////////////////////////////////////// //// > //////////// testdll.c /////////////////////////////////////////////////// > > #include "wdm.h" > #include <windows.h> > > HANDLE g_hInst; > BOOL APIENTRY LibMain( HANDLE hDll, DWORD dwReason, LPVOID lpReserved ) > { > switch( dwReason ) > { > case DLL_PROCESS_ATTACH: > g_hInst = hDll; > > break; > > case DLL_PROCESS_DETACH: > break; > > default: > break; > } > > return TRUE; > } > > > > ****************** > > WDMAUDIODEV addresses: > Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx > Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe > Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe > Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx > > URL to WDMAUDIODEV page: > http://www.wdmaudiodev.de/ > > ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/