GetPackageId function

Gets the package identifier (ID) for the specified process.

Syntax


LONG WINAPI GetPackageId(
  _In_      HANDLE hProcess,
  _Inout_   UINT32 *bufferLength,
  _Out_opt_ BYTE   *pBuffer
);

Parameters

hProcess [in]

Type: HANDLE

A handle to the process that has the PROCESS_QUERY_INFORMATION or PROCESS_QUERY_LIMITED_INFORMATION access right. For more information, see Process Security and Access Rights.

bufferLength [in, out]

Type: UINT32*

On input, the size of buffer, in bytes. On output, the size of the structure returned, in bytes.

pBuffer [out, optional]

Type: BYTE*

The package ID, represented as a PACKAGE_ID structure.

Return value

Type: LONG

If the function succeeds it returns ERROR_SUCCESS. Otherwise, the function returns an error code. The possible error codes include the following.

Return code	Description
APPMODEL_ERROR_NO_PACKAGE	The process has no package identity.
ERROR_INSUFFICIENT_BUFFER	The buffer is not large enough to hold the data. The required size is specified by bufferLength.

Examples

C++


#define _UNICODE 1
#define UNICODE 1

#include <Windows.h>
#include <appmodel.h>
#include <malloc.h>
#include <stdlib.h>
#include <stdio.h>

int ShowUsage();
void ShowProcessPackageId(__in const UINT32 pid, __in HANDLE process);
void ShowPackageId(__in const PACKAGE_ID * packageId);

int ShowUsage()
{
    wprintf(L"Usage: GetPackageId <pid> [<pid>...]\n");
    return 1;
}

int __cdecl wmain(__in int argc, __in_ecount(argc) WCHAR * argv[])
{
    if (argc <= 1)
        return ShowUsage();

    for (int i=0; i<argc; ++i)
    {
        UINT32 pid = wcstoul(argv[i], NULL, 10);
        if (pid > 0)
        {
            HANDLE process = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, FALSE, pid);
            if (process == NULL)
                wprintf(L"Error %d in OpenProcess (pid=%u)\n", GetLastError(), pid);
            else
            {
                ShowProcessPackageId(pid, process);
                CloseHandle(process);
            }
        }
    }
    return 0;
}

void ShowProcessPackageId(__in const UINT32 pid, __in HANDLE process)
{
    wprintf(L"Process %u (handle=%p)\n", pid, process);

    UINT32 length = 0;
    LONG rc = GetPackageId(process, &length, NULL);
    if (rc != ERROR_INSUFFICIENT_BUFFER)
    {
        if (rc == APPMODEL_ERROR_NO_PACKAGE)
            wprintf(L"Process has no package identity\n");
        else
            wprintf(L"Error %d in GetPackageId\n", rc);
        return;
    }

    BYTE * buffer = (PBYTE) malloc(length);
    if (buffer == NULL)
    {
        wprintf(L"Error allocating memory\n");
        return;
    }

    rc = GetPackageId(process, &length, buffer);
    if (rc != ERROR_SUCCESS)
        wprintf(L"Error %d retrieving PackageId\n", rc);
    else
        ShowPackageId((PACKAGE_ID *) buffer);

    free(buffer);
}

void ShowPackageId(__in const PACKAGE_ID * packageId)
{
    wprintf(L"    Name        : %s\n", packageId->name);
    wprintf(L"    Publisher   : <NULL>\n");
    wprintf(L"    PublisherId : %s\n", packageId->publisherId);
    wprintf(L"    Version     : %hu.%hu.%hu.%hu\n",
            packageId->version.Major,
            packageId->version.Minor,
            packageId->version.Build,
            packageId->version.Revision);
    wprintf(L"    Architecture: %u\n", packageId->processorArchitecture);
    if (packageId->resourceId != NULL)
        wprintf(L"    Resource    : %s\n", packageId->resourceId);
}

Requirements

Minimum supported client	Windows 8 [desktop apps only]
Minimum supported server	Windows Server 2012 [desktop apps only]
Header	AppModel.h
Library	Kernel32.lib
DLL	Kernel32.dll