OS_WOW6432

When the IsOS function is given OS_WOW6432 as its dwOS argument, it answers according to the result of calling the NTDLL function NtQueryInformationProcess, for the information class ProcessWow64Information, for the current process.

The information is sought only when the function is first called (per-process) for this case of dwOS. The function returns TRUE if

• it can load “ntdll.dll”
• and this DLL exports a function named NtQueryInformationProcess
• and this function returns success when called for the current process and with ProcessWow64Information given as the information class
• and the DWORD of process information produced by this call is non-zero

Availability

The OS_WOW6432 case of the SHLWAPI function IsOS is supported in version 6.00 and higher.