typedef struct _FPO_DATA {
    DWORD ulOffStart;      // offset 1st byte of function code
    DWORD cbProcSize;      // number of bytes in function
    DWORD cdwLocals;       // number of bytes in locals/4
    WORD cdwParams;        // number of bytes in params/4
    WORD cbProlog : 8;     // number of bytes in prolog
    WORD cbRegs   : 3;     // number of registers saved
    WORD fHasSEH  : 1;     // TRUE for structured exception handling
    WORD fUseBP   : 1;     // TRUE if EBP register has been allocated
    WORD reserved : 1;     // reserved for future use
    WORD cbFrame  : 2;     // frame type
} FPO_DATA, *PFPO_DATA;
 

I could go this far beyound that i am confused

unsafe public struct FPO_DATA
            {
                public System.UInt32 ulOffStart;
                public System.UInt32 cbProcSize;
                public System.UInt32 cdwLocals;
                public System.UInt16 cdwParams;

                //System.UInt16 cbProlog : 8 ;      
                //System.UInt16 cbRegs   : 3 ;      
                //System.UInt16 fHasSEH  : 1 ;      
                //System.UInt16 fUseBP   : 1 ;      
                //System.UInt16 reserved : 1 ;      
                //System.UInt16 cbFrame  : 2 ;      
            }  ;


2) Do you think i converted this struct correctly


typedef struct _IMAGE_SECTION_HEADER {
    BYTE    Name[IMAGE_SIZEOF_SHORT_NAME];
    union {
        DWORD   PhysicalAddress;
        DWORD   VirtualSize;
    } Misc;
    DWORD   VirtualAddress;
    DWORD   SizeOfRawData;
    DWORD   PointerToRawData;
    DWORD   PointerToRelocations;
    DWORD   PointerToLinenumbers;
    WORD    NumberOfRelocations;
    WORD    NumberOfLinenumbers;
    DWORD   Characteristics;
} IMAGE_SECTION_HEADER, *PIMAGE_SECTION_HEADER;
 
public enum IMAGE_SIZEOF_SHORT_NAME 
{
   IMAGE_SIZEOF_SHORT_NAME = 8 
}

unsafe public struct Misc
            {
                public System.UInt32 PhysicalAddress;
                public System.UInt32 VirtualSize;
            } ;
unsafe public struct IMAGE_SECTION_HEADER
            {
                [MarshalAs(UnmanagedType.ByValArray, SizeConst =  IMAGE_SIZEOF_SHORT_NAME.IMAGE_SIZEOF_SHORT_NAME )]  
                public System.Byte Name; //[ IMAGE_SIZEOF_SHORT_NAME ] ;  
                public Misc Misc;
                public System.UInt32 VirtualAddress;
                public System.UInt32 SizeOfRawData;
                public System.UInt32 PointerToRawData;
                public System.UInt32 PointerToRelocations;
                public System.UInt32 PointerToLinenumbers;
                public System.UInt16 NumberOfRelocations;
                public System.UInt16 NumberOfLinenumbers;
                public System.UInt32 Characteristics;
            } ;