diff --git a/ExportQBGISCtrlClass.cpp b/ExportQBGISCtrlClass.cpp
index 56b35bc..ab991cb 100644
--- a/ExportQBGISCtrlClass.cpp
+++ b/ExportQBGISCtrlClass.cpp
@@ -407,7 +407,7 @@ extern "C" void WINAPI UpdateDataInfo(int index,const char* key,double value )
 
 //功能：目标追踪测试接口
 //输入：经纬度，点的像素大小，默认20
-extern "C" _declspec(dllexport) void  OnShowTargetPoint(const double lon, const double lat, const int pixelSize)
+extern "C" void WINAPI OnShowTargetPoint(const double lon, const double lat, const int pixelSize)
 {
 	AFX_MANAGE_STATE(AfxGetAppModuleState());
 	if (g_bCreateMap)
diff --git a/GISDlg.cpp b/GISDlg.cpp
index c5b1e04..0c45b73 100644
--- a/GISDlg.cpp
+++ b/GISDlg.cpp
@@ -8467,7 +8467,7 @@ void CGISDlg::SaveMultiRouteLine(CString pathDirName,double heightInterval,const
 }
 
 
-void CGISDlg::OnShowTargetPoint(double lon,double lat,int pixelSize)
+void CGISDlg::OnShowTargetPoint(const double lon,const double lat,int pixelSize)
 {
 	if (testLayer!=-1)
 	{
diff --git a/GISDlg.h b/GISDlg.h
index 08a1330..403bd1d 100644
--- a/GISDlg.h
+++ b/GISDlg.h
@@ -988,7 +988,7 @@ public:
 
 	/****************************吊舱目标追踪测试************************************/
 	long testLayer;
-	void OnShowTargetPoint(double lon,double lat,int pixelSize=20);
+	void OnShowTargetPoint(const double lon,const double lat,int pixelSize=20);
 };
 
 //{{AFX_INSERT_LOCATION}}