BitmapData^ bmpData = m_bmpImage->LockBits(
System::Drawing::Rectangle(0, 0, m_bmpImage->Width, m_bmpImage->Height),ImageLockMode::ReadWrite, PixelFormat::Format24bppRgb);
MyImageData myimgData;//自定义数据格式。
myimgData.Resize(bmpData->Width, bmpData->Height, 3, bmpData->Stride);
memcpy(imgData.Data, (char*)(void*)bmpData->Scan0, bmpData->Stride*bmpData->Height);