windows 7 - GetProcAddress doesn't work for functions other than void -


i have problem getprocaddress: wrote simple dll 1 function in it:

extern "c" lresult winapi function(hwnd hwnd, uint message,                                    wparam wparam, lparam lparam) {     beep(1000, 1000);     return callnexthookex(0, message, wparam, lparam); }

when try function's address getprocaddress fails errorcode 127 (error_proc_not_found). however, if use void function type works perfectly. can't figure out why behaves this. suggestions appreciated!

btw: dependencywalker shows function's name indeed "function" no changes have been applied.

there 2 failure modes getprocaddress:

  • you didn't export function
  • you didn't name right

the exported named of function not "function" unless used .def file rename export or created 64-bit dll. "_function@16" 32-bit build. @16 postfix associated fact have trouble making work functions arguments.

from visual studio command prompt run dumpbin.exe /exports on dll see exports. delete .pdb file in same directory if there one.


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