FPCM_GET_FRAME_BITMAP

typedef struct SFPCGetFrameBitmap
{
    // [out]
    HBITMAP hBitmap;

} SFPCGetFrameBitmap;

hwndFlashPlayerControl = 
    FPC_CreateWindow(...);
...
// Create a bitmap from current frame
SFPCGetFrameBitmap FPCGetFrameBitmap = { 0 };

::SendMessage(hwndFlashPlayerControl, FPCM_GET_FRAME_BITMAP, 0, (LPARAM)&FPCGetFrameBitmap);

HBITMAP hBitmap = FPCGetFrameBitmap.hBitmap;
...
DeleteObject(hBitmap);