Help with importing DLL

TimSWatson

Hi Im having trouble with a imported function called ICCompress. Im not sure if I have transled the function properly can someone help me? Native

typedef struct tagBITMAPINFOHEADER {
DWORD biSize;
LONG biWidth;
LONG biHeight;
WORD biPlanes;
WORD biBitCount
DWORD biCompression;
DWORD biSizeImage;
LONG biXPelsPerMeter;
LONG biYPelsPerMeter;
DWORD biClrUsed;
DWORD biClrImportant;
} BITMAPINFOHEADER;

DWORD ICCompress(
HIC hic,
DWORD dwFlags,
LPBITMAPINFOHEADER lpbiOutput,
LPVOID lpData,
LPBITMAPINFOHEADER lpbiInput,
LPVOID lpBits,
LPDWORD lpckid,
LPDWORD lpdwFlags,
LONG lFrameNum,
DWORD dwFrameSize,
DWORD dwQuality,
LPBITMAPINFOHEADER lpbiPrev,
LPVOID lpPrev
);

C# code

    \[StructLayoutAttribute(LayoutKind.Sequential)\]
    public struct BITMAPINFOHEADER
    {
        public uint biSize;
        public int biWidth;
        public int biHeight;
        public ushort biPlanes;
        public ushort biBitCount;
        public uint biCompression;
        public uint biSizeImage;
        public int biXPelsPerMeter;
        public int biYPelsPerMeter;
        public uint biClrUsed;
        public uint biClrImportant;
    }

    \[DllImport("MSVFW32.dll")\]
    public static extern int ICCompress(
        IntPtr hic,
        UInt32 dwFlags,        // flags
        ref BITMAPINFOHEADER lpbiOutput,     // output format
        IntPtr lpData,         // output data
        ref BITMAPINFOHEADER lpbiInput,      // format of frame to compress
        IntPtr lpBits,         // frame data to compress
        out UInt32 lpckid,         // ckid for data in AVI file
        out UInt32 lpdwFlags,      // flags in the AVI index.
        int lFrameNum,      // frame number of seq.
        UInt32 dwFrameSize,    // reqested size in bytes. (if non zero)
        UInt32 dwQuality,      // quality within one frame
        IntPtr lpbiPrev,       // format of previous frame
        IntPtr lpPrev          // previous frame
        );

The code that calls ICCompress is

        // Setup compressor
        compressorHnd = Avi.ICOpen(Avi.FOURCC.ICTYPE\_VIDEO, Avi.FOURCC.mmioFOURCC('L','E','A','D'), Avi.ICMODE.ICMODE\_COMPRESS);
        
        outbi = new Avi.BITMAPINFOHEADER();
        inbi = new Avi.BITMAPINFOHEADER

TimSWatson

Ok i think that the problem is that I havnt specified the correct format in lpbiOutput. So I need to get the correct output format. I found a function called ICCompressGetFormat but I dont know how to use it. Can I import this function?

realJSOP

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