这里以DL字符识别CPU模块为例，代码如下，其中0.5f是比例关系（将图看作1）。

1. C# 

2. public void OCRROISetFunc(ref VMControls.WPF.Release.VmRenderControl vmRenderControl1)

3. {

4.     /////////OCRROISET

5.     IMVSOcrDlModuCTool iMVSOcrDlModuCTool = (IMVSOcrDlModuCTool)VmSolution.Instance["流程1.DL字符识别C1"];

6.     RoiBox roiBox = new RoiBox();

7.     roiBox.bRoiType = (byte)RoiType.ROI_TYPE_BOX;

8.     roiBox.fCenterX = 0.5f;

9.     roiBox.fCenterY = 0.68f;

10.      roiBox.fWidth = 0.5f;

11.      roiBox.fHeight = 0.1f;

12.   

13.      IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(roiBox));

14.      Marshal.StructureToPtr(roiBox, ptr, false);

15.      iMVSOcrDlModuCTool.ModuParams.SetBinaryData("RoiType", ptr, (uint)Marshal.SizeOf(roiBox));

16.      vmRenderControl1.ModuleSource = iMVSOcrDlModuCTool;

17.  }