Hello group, I'm trying to compile an user mode dll using the build utility and a sources file. It builds successfully but the calling convention is __stdcall by default. I need to change this to __cdecl. I tried the USER_C_FLAGS macro as shown below. However, this results in a compiler error "/Gz and /Gd command-line options are incompatible"... Any thoughts how to do it right? Thanks, Stephan sources file: .... USE_MAPSYM=1 USE_MSVCRT=1 UMTYPE=windows SYNCHRONIZE_BLOCK=1 C_DEFINES= $(C_DEFINES) /DWIN32 /DNDEBUG /D_WINDOWS MSC_WARNING_LEVEL=/W3 /WX USER_C_FLAGS= /Gd /MT ... ****************** 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/