windows - RtlQueryRegistryValues read REG_DWORD -

i'm writing uart16550 driver, , 1 of things have read registry initialization parameters using rtlqueryregistryvalues.

(a lot of code skipped...)

rtl_query_registry_table table[2]; 

and

table[1].queryroutine = null; table[1].name = null; 

the parameter stored in registry reg_dword , i'm trying set table with:

unsigned long buffer; 

(because dword not defined in ntddk.h , i'm not sure if break including windef.h) and

table[0].entrycontext = &buffer; 

the status of call rtlqueryregistryvalues status_success

status =  rtlqueryregistryvalues(     rtl_registry_absolute,     path,     table,     null,     null); 

but when try to

dbgprint("registry: %lu", buffer) 

i way big numbers (i expected result 1 or 2).

am doing wrong dbgprint, or parameters aren't set correctly query table?

and red_dword data type defined?

edit:

wchar keyname[20] = "parameter"; char def[20] = "parameter"; wchar path[100] = l"\\registry\\machine\\system\\currentcontrolset\\services\\hello\\parameters";  unsigned long buffer;  table[0].queryroutine = null;  table[0].name = keyname;  table[0].flags = rtl_query_registry_direct;  table[0].entrycontext = &buffer;  table[0].defaulttype = reg_dword;  table[0].defaultdata = def;  table[0].defaultlength = strlen(def) + 1; 

table[0].defaultdata should pointer unsigned long.
table[0].defaultlength should sizeof(unsigned long).

otherwise may 1634886000 default value converted long ('para'). else looks should work (assuming key , value exists).

reg_dword defined in winnt.h

#define reg_dword                   ( 4 )   // 32-bit number #define reg_dword_little_endian     ( 4 )   // 32-bit number (same reg_dword) #define reg_dword_big_endian        ( 5 )   // 32-bit number