c++ - how to wait for a non-child process with winapi? -

i read:

• how wait process finish c++
• how use win32 createprocess function wait until child done write file

code snippet:

handle  hprocess = openprocess(synchronize, true, inprocessid);   if (null == hprocess) {     waitforsingleobject(hprocess,infinite); } 

i've tried waitforsingleobject , waitforsingleobjectex, neither waiting.

for example assume notepad running , want wait closed user. shall ?

from documentation openprocess:

if function succeeds, return value open handle specified process.

if function fails, return value null. extended error information, call getlasterror.

so if statement should be:

if (null != hprocess) ...