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Update nf-wow64apiset-iswow64process.md #1961

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Update nf-wow64apiset-iswow64process.md
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Update links and format in IsWow64Process doc
stevewhims Jan 27, 2025
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24 changes: 9 additions & 15 deletions sdk-api-src/content/wow64apiset/nf-wow64apiset-iswow64process.md
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Expand Up @@ -6,7 +6,7 @@ helpviewer_keywords: ["IsWow64Process","IsWow64Process function","_win32_iswow64
old-location: base\iswow64process.htm
tech.root: fs
ms.assetid: 5a237542-e432-487c-aa59-2ede427dd1eb
ms.date: 12/05/2018
ms.date: 01/27/2025
ms.keywords: IsWow64Process, IsWow64Process function, _win32_iswow64process, base.iswow64process, winbase/IsWow64Process, wow64apiset/IsWow64Process
req.header: wow64apiset.h
req.include-header: Windows.h on Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008 Windows Server 2008 R2
Expand Down Expand Up @@ -52,9 +52,6 @@ api_name:
- IsWow64Process
---

# IsWow64Process function


## -description

Determines whether the specified process is running under
Expand All @@ -70,28 +67,26 @@ A handle to the process. The handle must have the PROCESS_QUERY_INFORMATION or P

### -param Wow64Process [out]

A pointer to a value that is set to TRUE if the process is running under WOW64 on an Intel64 or x64 processor. If the process is running under 32-bit Windows, the value is set to FALSE. If the process is a 32-bit application running under 64-bit Windows 10 on ARM, the value is set to FALSE. If the process is a 64-bit application running under 64-bit Windows, the value is also set to FALSE.
A pointer to a value that is set to TRUE if the process is running under WOW64 on an Intel64, x64, or ARM64 processor. If the process is running under 32-bit Windows, the value is set to FALSE. If the process is a 32-bit application running under 64-bit Windows 10 on ARM, the value is set to FALSE. If the process is a 64-bit application running under 64-bit Windows, the value is also set to FALSE.

## -returns

If the function succeeds, the return value is a nonzero value.

If the function fails, the return value is zero. To get extended error information, call
<a href="/windows/desktop/api/errhandlingapi/nf-errhandlingapi-getlasterror">GetLastError</a>.
<a href="/windows/win32/api/errhandlingapi/nf-errhandlingapi-getlasterror">GetLastError</a>.

## -remarks

Applications should use <a href="/windows/desktop/api/wow64apiset/nf-wow64apiset-iswow64process2">IsWow64Process2</a> instead of <b>IsWow64Process</b> to determine if a process is running under WOW. <b>IsWow64Process2</b> removes the ambiguity inherent to multiple WOW environments by explicitly returning both the architecture of the host and guest for a given process. Applications can use this information to reliably identify situations such as running under emulation on ARM64. To compile an application that uses this function, define _WIN32_WINNT as 0x0501 or later. For more information, see
Applications should use <a href="/windows/win32/api/wow64apiset/nf-wow64apiset-iswow64process2">IsWow64Process2</a> instead of <b>IsWow64Process</b> to determine if a process is running under WOW. <b>IsWow64Process2</b> removes the ambiguity inherent to multiple WOW environments by explicitly returning both the architecture of the host and guest for a given process. Applications can use this information to reliably identify situations such as running under emulation on ARM64. To compile an application that uses this function, define _WIN32_WINNT as 0x0501 or later. For more information, see
<a href="/windows/desktop/WinProg/using-the-windows-headers">Using the Windows Headers</a>.


#### Examples
## Examples

For compatibility with operating systems that do not support this function, call
<a href="/windows/desktop/api/libloaderapi/nf-libloaderapi-getprocaddress">GetProcAddress</a> to detect whether
<a href="/windows/win32/api/libloaderapi/nf-libloaderapi-getprocaddress">GetProcAddress</a> to detect whether
<b>IsWow64Process</b> is implemented in Kernel32.dll. If <b>GetProcAddress</b> succeeds, it is safe to call this function. Otherwise, WOW64 is not present. Note that this technique is not a reliable way to detect whether the operating system is a 64-bit version of Windows because the Kernel32.dll in current versions of 32-bit Windows also contains this function.


```cpp
#include <windows.h>
#include <tchar.h>
Expand Down Expand Up @@ -130,17 +125,16 @@ int main( void )

return 0;
}

```

## -see-also

<a href="/windows/desktop/api/sysinfoapi/nf-sysinfoapi-getnativesysteminfo">GetNativeSystemInfo</a>
<a href="/windows/win32/api/sysinfoapi/nf-sysinfoapi-getnativesysteminfo">GetNativeSystemInfo</a>



<a href="/windows/desktop/api/winuser/nf-winuser-iswow64message">IsWow64Message</a>
<a href="/windows/win32/api/winuser/nf-winuser-iswow64message">IsWow64Message</a>



<a href="/windows/desktop/WinProg64/running-32-bit-applications">WOW64</a>
<a href="/windows/desktop/WinProg64/running-32-bit-applications">WOW64</a>