More reliable way to detect steam app folder

[BenRQ]

In order to obtain a Steam games folder you have to follow this steps:

1. find Steam installation folder
2. check Steam acf files and libraryfolders.vdf

You can find Steam InstallPath in windows registry:

• 32-bit: HKEY_LOCAL_MACHINE\SOFTWARE\Valve\Steam
• 64-bit: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Valve\Steam

You can read a Value from a Registry Key using this code:

Dim strSteamInstallPath as String = My.Computer.Registry.GetValue(
    "HKEY_LOCAL_MACHINE\SOFTWARE\Valve\Steam", "InstallPath", Nothing)

MsgBox("The install path is " & strSteamInstallPath)

Once you have Steam main folder (the one containing steam.exe) you can read games installation folder from appmanifest_<steamappid>.acf files contained in \steamapps subfolder.

For example, appmanifest_2280.acf contains informations about Ultimate Doom.

You can search for a particular steamappid or analyze every files and get game name from name key.

Also check libraryfolders.vdf in \steamapps subfolder for other game installation folders.

For example I have some games in D:\mygames so my libraryfolders.vdf is:

"LibraryFolders"
{
	"TimeNextStatsReport"   "xxxxxxxxxxx"
	"ContentStatsID"        "xxxxxxxxxxx"
	"1"                     "D:\\mygames"
}

Once you have this alternative folder, check for acm files contained in \steamapps subfolder.

https://stackoverflow.com/questions/34090258/find-steam-games-folder/34091380#34091380

This method would be much more reliant.

Originally posted by @redwolf2 in #656 (comment)

[chrismaliszewski]

I checked the instruction.

The beginning, the Steam installation folder, is fine.

libraryfolders.vdf file also contains what the instruction says.
Additional info: each installation folder has its own increasing stringify ID number beginning from "1", i.e.:

"LibraryFolders"
{
	"TimeNextStatsReport"		"XXXX"
	"ContentStatsID"		"XXXX"
	"1"		"D:\\Gry\\Steam"
	"2"		"P:\\Gry\\Steam"
}

The location of the appmanifest_XXXXXX.acf files isn't right. The files are not stored inside the Steam main folder but instead separately inside each Library Folder. So in my case, inside D:\Gry\Steam\steamapps\ I have several *.acf files. A structure of a file type is as follows:

"AppState"
{
	"appid"		"APP_ID"
	...
	"name"		"NAME_OF_A_GAME"
	"StateFlags"		"4"
	"installdir"		"NAME_OF_A_DIR_WHERE_THE_GAME_IS_INSTALLED_INSIDE_\common\_CATALOGUE"
	"LastUpdated"		"1549341958"
	"UpdateResult"		"0"
	...
	"buildid"		"753362"
	...
	"UserConfig"
	{
		"language"		"english"
	}
	...
}