Sound.obj : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol __imp__waveOutUnprepareHeader@12Debug/client.exe : fatal error LNK1120: 15 unresolved externals执行 link.exe 时出错.Creating browse info file...
client.exe - 1 error(s), 0 warning(s)

出现这样的问题是怎么回事啊 高人帮帮我吧

Sound.obj : error LNK2001: unresolved external symbol __imp__waveOutClose@4
Sound.obj : error LNK2001: unresolved external symbol __imp__waveInClose@4
Sound.obj : error LNK2001: unresolved external symbol __imp__waveOutWrite@12
Sound.obj : error LNK2001: unresolved external symbol __imp__waveOutPrepareHeader@12
Sound.obj : error LNK2001: unresolved external symbol __imp__waveInAddBuffer@12
Sound.obj : error LNK2001: unresolved external symbol [email protected] : error LNK2001: unresolved external symbol __imp__waveOutOpen@24
Sound.obj : error LNK2001: unresolved external symbol __imp__waveInOpen@24
Sound.obj : error LNK2001: unresolved external symbol __imp__waveOutGetNumDevs@0
Sound.obj : error LNK2001: unresolved external symbol __imp__waveInGetNumDevs@0
Sound.obj : error LNK2001: unresolved external symbol __imp__waveInStart@4
Sound.obj : error LNK2001: unresolved external symbol __imp__waveInReset@4
Sound.obj : error LNK2001: unresolved external symbol __imp__waveInStop@4
Sound.obj : error LNK2001: unresolved external symbol __imp__waveInUnprepareHeader@12
Sound.obj : error LNK2001: unresolved external symbol __imp__waveOutUnprepareHeader@12
Debug/client.exe : fatal error LNK1120: 15 unresolved externals执行
link.exe 时出错.Creating browse info file...
client.exe - 1 error(s), 0 warning(s)