public static IntPtr FindProcessWindow(string processName)
{
var hwndFound = IntPtr.Zero;
bool enumWindowsProc(IntPtr hwnd, IntPtr lparam)
{
if (!WinApi.IsWindowVisible(hwnd))
{
return(true);
}
WinApi.GetWindowThreadProcessId(hwnd, out var pid);
if (pid == 0)
{
return(true);
}
var hProcess = WinApi.OpenProcess(WinApi.PROCESS_QUERY_LIMITED_INFORMATION, false, pid);
if (hProcess == IntPtr.Zero)
{
return(true);
}
try
{
var buffer = new StringBuilder(1024);
int size = buffer.Capacity;
if (WinApi.QueryFullProcessImageName(hProcess, 0, buffer, out size))
{
var path = buffer.ToString();
var fileName = System.IO.Path.GetFileNameWithoutExtension(path);
if (String.Compare(fileName, processName, ignoreCase: true) == 0)
{
hwndFound = hwnd;
return(false);
}
}
}
finally
{
WinApi.CloseHandle(hProcess);
}
return(true);
}
WinApi.EnumDesktopWindows(IntPtr.Zero, enumWindowsProc, IntPtr.Zero);
return(hwndFound);
}
public static IntPtr GetPrevActiveWindow()
{
var foregroundWindow = WinApi.GetAncestor(WinApi.GetForegroundWindow(), WinApi.GA_ROOT);
var hwndPrev = IntPtr.Zero;
var hwndFound = IntPtr.Zero;
bool enumWindowsProc(IntPtr hwnd, IntPtr lparam)
{
if (WinApi.IsWindowVisible(hwnd))
{
if (hwndPrev == foregroundWindow)
{
hwndFound = hwnd;
return(false);
}
hwndPrev = hwnd;
}
return(true);
}
WinApi.EnumDesktopWindows(IntPtr.Zero, enumWindowsProc, IntPtr.Zero);
return(hwndFound);
}