- 1 year ago
FindWindow for different session
The FindWindow
function in Windows allows you to find a window by its class name or window title. However, it operates within the current session, and by default, it cannot find windows in other user sessions.
To find a window in a different user session, you'll need to use the Windows API functions that support interprocess communication and session management, such as EnumWindows
, EnumChildWindows
, or GetWindowText
.
Here's an example using EnumWindows
to find a window in a different session:
cpp#include <Windows.h>
BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lParam) {
DWORD targetSessionId = *(DWORD*)lParam;
DWORD windowProcessId;
DWORD windowThreadId = GetWindowThreadProcessId(hwnd, &windowProcessId);
DWORD currentSessionId = WTSGetActiveConsoleSessionId();
if (windowProcessId != 0 && windowThreadId != 0 && currentSessionId != targetSessionId) {
// Skip windows in other sessions
return TRUE;
}
// Process the window here, e.g., check the window title or class name
// ...
return TRUE; // Continue enumeration
}
int main() {
DWORD targetSessionId = 1; // Specify the target session ID here
EnumWindows(EnumWindowsProc, (LPARAM)&targetSessionId);
return 0;
}
In this example:
- The
EnumWindows
function is used to enumerate all top-level windows on the system. - The
EnumWindowsProc
callback function is called for each enumerated window. - Inside
EnumWindowsProc
, we retrieve the process ID and thread ID of the window usingGetWindowThreadProcessId
. - We also obtain the current session ID using
WTSGetActiveConsoleSessionId
. - If the window belongs to a different session (based on process and thread IDs), we skip it and continue the enumeration.
- If the window belongs to the target session, you can process it further as needed (e.g., check window title or class name).
Note that you need appropriate privileges to access windows in other sessions. This code snippet demonstrates how to use EnumWindows
to iterate through windows in different sessions. You can modify it based on your specific requirements to find the desired window.