小编Wol*_*rsh的帖子

我试图将Jim Kyle在90年代早期编写的btrieve代码升级到VB.NET,并且遇到了联合结构的问题.旧的C代码如下:

    typedef struct {
      union {
        struct {
          PGPTR   PgSeq;    // 00 - page number
          int     Usage;    // 04 - match with usage count
          int     Version;  // 06 - version code, <0 if owned
        } v5;
        struct {
          int     RecSig;   // 00 - 'FC'
          int     SeqNbr;   // 02 - always binary zeroes
          long    Usage;    // 04 - usage count
        } v6;
      } r1;
      int     PagSize;  // 08 - in bytes
    } FCRTOP;

到目前为止,我有:

    <StructLayout(LayoutKind.Explicit)> _
Structure FCRTOP
    <FieldOffset(0)> Public …