http://msdn.microsoft.com/en-us/library/cc144179(VS.85).aspx
has some info
when Explorer.exe is killed, and restart, the system tray icon dispears,
because it doesn't handle "TaskbarCreated" message.
The correction can be done as follows:
LRESULT CALLBACK WndProc(HWND hWnd,
UINT uMessage,
WPARAM wParam,
LPARAM lParam)
{
static UINT s_uTaskbarRestart;
switch(uMessage)
{
case WM_CREATE:
s_uTaskbarRestart = RegisterWindowMessage(TEXT("TaskbarCreated"));
break;
default:
if(uMessage == s_uTaskbarRestart)
AddTaskbarIcons();
break;
}
return DefWindowProc(hWnd, uMessage, wParam, lParam);
}
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