Direct Show 应用程序某个编译错误的解决办法
新近编程要vc9 (Visual Studio 2008)用到usb摄像头，在编译direct show基础库的时候，遇到如下的错误提示：
:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/include/winnt.h(222) : error C2146: syntax error : missing ';' before identifier 'PVOID64'
C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/include/winnt.h(222) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/include/winnt.h(5940) : error C2146: syntax error : missing ';' before identifier 'Buffer'
C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/include/winnt.h(5940) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/include/winnt.h(5940) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
其中C4430好解决，这只是vc6向vc9移植时的一般问题。比较难办的是c2146.
有一种办法是说调整编译器配置选项中的头文件顺序，如
Before I have (he don't works)
C:/DXSDK/Include
$(VCInstallDir)include
$(VCInstallDir)atlmfc/include
$(VCInstallDir)PlatformSDK/include
$(FrameworkSDKDir)include
Now i solve the problem with the order of directx SDK
$(VCInstallDir)include
$(VCInstallDir)atlmfc/include
$(VCInstallDir)PlatformSDK/include
$(FrameworkSDKDir)include
C:/DXSDK/Include
good luck
但上面的办法在某些项目中解决不了，比如dshow自动的示例。下面给出产生这个问题的原因和解决办法。
原因：
DirectX Include目录下面包含了一个叫BaseTsd.h的过期的头文件，它并没有定义类型 ,我们可以命名用Platform SDK的头文件来代替它。
解决办法：
非常简单，把 DirectX Include中的BaseTsd.h删除即可。这样做的优点是，不用再来回调整头文件的顺序了。