我安装了Direct9 SDK 而且在Tool->Options的选项中把VC98的放在了第一位，把Direct9 SDK的放在了第二位，这样当我声明DirectDraw时，会报错说：'LPDIRECTDRAW7' : missing storage-class or type specifiers。而当我把VC98的include放在了第二位，把Direct9 SDK的include放在了第一位时，又会报错说：C:\PROGRAM FILES\MICROSOFT DIRECTX 9.0 SDK (SUMMER 2004)\INCLUDE\dsound.h(305) : error C2146: syntax error : missing ';' before identifier 'dwReserved1'
C:\PROGRAM FILES\MICROSOFT DIRECTX 9.0 SDK (SUMMER 2004)\INCLUDE\dsound.h(305) : error C2501: 'DWORD_PTR' : missing storage-class or type specifiers
C:\PROGRAM FILES\MICROSOFT DIRECTX 9.0 SDK (SUMMER 2004)\INCLUDE\dsound.h(305) : error C2501: 'dwReserved1' : missing storage-class or type specifiers
C:\PROGRAM FILES\MICROSOFT DIRECTX 9.0 SDK (SUMMER 2004)\INCLUDE\dsound.h(306) : error C2146: syntax error : missing ';' before identifier 'dwReserved2'
C:\PROGRAM FILES\MICROSOFT DIRECTX 9.0 SDK (SUMMER 2004)\INCLUDE\dsound.h(306) : error C2501: 'DWORD_PTR' : missing storage-class or type specifiers
C:\PROGRAM FILES\MICROSOFT DIRECTX 9.0 SDK (SUMMER 2004)\INCLUDE\dsound.h(306) : error C2501: 'dwReserved2' : missing storage-class or type specifiers

请问这如何是好啊，到底该怎么办，该把那个放在前边？？？