From: Iain Patterson <me@iain.cx>
Date: Sun, 29 Dec 2013 17:29:21 +0000 (+0000)
Subject: Detect if we were double-clicked.
X-Git-Tag: v2.22~104
X-Git-Url: http://git.iain.cx/?a=commitdiff_plain;ds=sidebyside;h=dd0e555ba889a74ae14487ca0b4a5c62cfa4d873;hp=dd0e555ba889a74ae14487ca0b4a5c62cfa4d873;p=nssm.git

Detect if we were double-clicked.

Because we are compiled as a console subsystem application, if the user
double-clicks the executable it will pop up a new console window.  Then,
since no arguments were passed, we will dump a usage message which the
user won't have time to read, and exit.

We now detect this situation and redirect the usage message to a popup.

There are three likely cases to handle.

If we are running in a service context there won't be a console window.
GetConsoleWindow() will return a null handle.

If were launched from a command window, the process ID owning the
console handle will be different from as our process ID.

If the process IDs are the same, we were started with a new console.  We
call FreeConsole() to close it and subsequently direct the usage message
to a message box.
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