Release版中动态连接库(DLL\LIB)问题!!!!!

我用sndPlaySound()来播放声音DEBUG版编译时没问题(在设置里我已加入winmm.lib),但Release版时出现以下错!!
OpenDriver() CloseDriver() SendDriverMessage()是利用别人视频卡的函数,它也有动态连接库文件(但没有lib文件).用什么办法能够解决这一类问题!!!!!

我这个问题是不是很笨! :) 大家多多指教哟!!!!!!!!本姑娘不胜感谢了!!我的qq是23311738.

--------------------Configuration: VideoClient - Win32 Release--------------------
Linking...
MenuLdFrm.obj : error LNK2001: unresolved external symbol __imp__sndPlaySoundA@8
MenuTopFrm.obj : error LNK2001: unresolved external symbol __imp__sndPlaySoundA@8
CtlMenu.obj : error LNK2001: unresolved external symbol __imp__sndPlaySoundA@8
MenuLaaFrm.obj : error LNK2001: unresolved external symbol __imp__sndPlaySoundA@8
MenuLbFrm.obj : error LNK2001: unresolved external symbol __imp__sndPlaySoundA@8
MenuLcFrm.obj : error LNK2001: unresolved external symbol __imp__sndPlaySoundA@8
FMPFctw.obj : error LNK2001: unresolved external symbol __imp__OpenDriver@12
FMPFctw.obj : error LNK2001: unresolved external symbol __imp__CloseDriver@12
FMPFctw.obj : error LNK2001: unresolved external symbol __imp__SendDriverMessage@16
Release/VideoClient.exe : fatal error LNK1120: 4 unresolved externals
Error executing link.exe.

VideoClient.exe - 10 error(s), 0 warning(s)
--------------------Configuration: VideoClient - Win32 Debug--------------------
Linking...

VideoClient.exe - 0 error(s), 0 warning(s)