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44 >SDL Library Documentation</TH
81 >Chapter 5. General</H1
93 > -- Initializes SDL</DT
96 HREF="sdlinitsubsystem.html"
98 > -- Initialize subsystems</DT
101 HREF="sdlquitsubsystem.html"
102 >SDL_QuitSubSystem</A
103 > -- Shut down a subsystem</DT
108 > -- Shut down SDL</DT
111 HREF="sdlwasinit.html"
113 > -- Check which subsystems are initialized</DT
116 HREF="sdlgeterror.html"
118 > -- Get SDL error string</DT
121 HREF="sdlenvvars.html"
123 > -- SDL environment variables</DT
127 >Before SDL can be used in a program it must be initialized with <A
136 > initializes all the subsystems that the user requests (video, audio, joystick, timers and/or cdrom). Once SDL is initialized with <TT
139 > subsystems can be shut down and initialized as needed using <A
140 HREF="sdlinitsubsystem.html"
143 >SDL_InitSubSystem</TT
146 HREF="sdlquitsubsystem.html"
149 >SDL_QuitSubSystem</TT
153 >SDL must also be shut down before the program exits to make sure it cleans up correctly. Calling <A
159 > shuts down all subsystems and frees any resources allocated to SDL.</P
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