c++ - how to pinvoke SLGetWindowsInformation from c# -

i know how pinvoke data structure given in function giving me more troubles figure out on own

function name slgetwindowsinformation exists @ slc.dll

    hresult winapi slgetwindowsinformation(   _in_      pcwstr     pwszvaluename,   _out_opt_ sldatatype *pedatatype,   _out_     uint       *pcbvalue,   _out_     pbyte      *ppbvalue ); 

for full reference here

thanks in advance , have wonderful day

like this:

enum sldatatype  {     sl_data_none      = reg_none,     sl_data_sz        = reg_sz,     sl_data_dword     = reg_dword,     sl_data_binary    = reg_binary,     sl_data_multi_sz  = reg_multi_sz,     sl_data_sum       = 100 }; // can values of reg_xxx constants windows header files      [dllimport("slc.dll", charset = charset.unicode)] static extern uint slgetwindowsinformation(     string valuename,     out sldatatype datatype,     out uint cbvalue,     out intptr value ); 

call function this:

sldatatype datatype; uint cbvalue; intptr valueptr; uint res = slgetwindowsinformation(valuename, out datatype, out cbvalue, out valueptr); // check res indicates success before proceeding byte[] value = new byte[cbvalue]; marshal.copy(valueptr, value, 0, value.length); marshal.freehglobal(valueptr); 

note may seem little confusing, marshal.freehglobal calls localfree, correct way deallocate buffer.