- 1 year ago
Switch to process that owns a handle
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To switch to the process that owns a specific handle in Windows, you can use the DuplicateHandle
function to obtain a duplicate handle in your process and then use the AttachThreadInput
function to attach your thread to the thread of the owning process.
Here's a general outline of the steps involved:
- Get the process ID (PID) and thread ID (TID) of the owning process from the handle.
- Open a handle to the owning process using
OpenProcess
. - Use
DuplicateHandle
to obtain a duplicate handle in your process. - Use
AttachThreadInput
to attach your thread to the thread of the owning process. - Switch to the owning process by calling
SetForegroundWindow
orSetActiveWindow
.
Here's an example of how you can switch to the process that owns a specific handle using C++ and the Windows API:
cpp#include <iostream>
#include <Windows.h>
int main()
{
// Get the handle you want to switch to (replace with your own handle)
HANDLE targetHandle = /* your handle here */;
// Get the owning process ID and thread ID
DWORD processId, threadId;
GetWindowThreadProcessId(targetHandle, &processId);
// Open a handle to the owning process
HANDLE processHandle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, processId);
if (!processHandle)
{
std::cerr << "Failed to open process" << std::endl;
return 1;
}
// Duplicate the handle in your process
HANDLE duplicateHandle;
if (!DuplicateHandle(processHandle, targetHandle, GetCurrentProcess(), &duplicateHandle, 0, FALSE, DUPLICATE_SAME_ACCESS))
{
std::cerr << "Failed to duplicate handle" << std::endl;
CloseHandle(processHandle);
return 1;
}
// Attach your thread to the owning process thread
AttachThreadInput(GetCurrentThreadId(), threadId, TRUE);
// Switch to the owning process
SetForegroundWindow(targetHandle);
SetActiveWindow(targetHandle);
// Cleanup
CloseHandle(processHandle);
CloseHandle(duplicateHandle);
return 0;
}
Note that this example assumes you have a valid handle to switch to and that you have the necessary permissions to open the target process and duplicate the handle.