/// <summary>
/// Removes the given tray icon using the TrayData we've fetched for it.
/// </summary>
private static void RemoveIcon(ExtraButtonData td)
{
var data = new NotifyIconData()
{
hWnd = td.hWnd,
uID = td.uID
};
//Try to remove the icon. Throw the last Win32 error if this fails.
if (!Shell_NotifyIcon(NIM_DELETE, data))
{
throw new Win32Exception();
}
}
/// <summary>
/// Removes any zombie icons (those whose processes no longer exist) from the notification tray.
/// </summary>
/// <returns>The number of tray icons removed.</returns>
public static uint RemoveZombieIcons()
{
var toolbarButton = new ToolbarButton();
var extraData = new ExtraButtonData();
uint totalRemovedCount = 0;
uint totalItemCount = 0;
foreach (var windowList in TrayWindowSearchList)
{
//Get a handle to the toolbar window
IntPtr toolbarHandle = FindNestedWindow(windowList);
if (toolbarHandle == IntPtr.Zero)
{
Utilities.Log($"No window found for list: {windowList}");
continue;
}
//Use that handle to open the toolbar's process
using (LP_Process process = new LP_Process(toolbarHandle))
{
//Allocate shared memory in the process to store toolbar button data for us to read
IntPtr remoteButtonPtr = process.Allocate(toolbarButton);
process.Allocate(extraData);
//Ask the window how many buttons it contains so we can iterate over them
uint itemCount = (uint)SendMessage(toolbarHandle, TB_BUTTONCOUNT, IntPtr.Zero, IntPtr.Zero);
totalItemCount += itemCount;
Utilities.Log($"Found {itemCount} tray icons (some may be hidden)");
uint removedCount = 0;
for (uint item = 0; item < itemCount; item++)
{
//We remove items starting from the leftmost (#0), so for each item we have removed, the remaining items' indices
// will have 1 subtracted from them (since they all just got shifted left by 1).
uint index = item - removedCount;
//Get info for this toolbar button
if ((uint)SendMessage(toolbarHandle, TB_GETBUTTON, new IntPtr(index), remoteButtonPtr) == 0)
{
throw new ApplicationException("TB_GETBUTTON failed");
}
process.Read(toolbarButton, remoteButtonPtr);
process.Read(extraData, toolbarButton.dwData);
//Open the handle for this button to see if its parent process exists or not. If it has no parent, it's a zombie - kill it!
IntPtr buttonHandle = extraData.hWnd;
if (buttonHandle == IntPtr.Zero)
{
throw new ApplicationException("Invalid handle in tray button data");
}
using (LP_Process proc = new LP_Process(buttonHandle))
{
if (proc.ownerProcessID == 0)
{
RemoveIcon(extraData);
removedCount++;
totalRemovedCount++;
}
}
}
}
}
Utilities.Log($"Done. {totalItemCount} icons found, {totalRemovedCount} icons removed.");
return(totalRemovedCount);
}
