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標題: LabWindows/CVI調用DLL實用例程(菜農HotPower) [打印本頁]

作者: hotpower 時間: 2009-4-2 23:57
標題: LabWindows/CVI調用DLL實用例程(菜農HotPower)
/*-------------------------------------------------------------------------------------------------------*/
/* LabWindows/CVI調用DLL實用例程(菜農HotPower)                                           */
/*  本例程是在CVI自帶的simple添加調用mydll.dll的函數MyDLLCdeclFunction()                               */
/*  網上和CVI的例程很少,一般為調用LIB實例,但很多dll都是以*.dll提供的,故本例程很實用。                   */
/*  本例程主要是調用了三個Windows API函數LoadLibrary(),GetProcAddress(),FreeLibrary()                   */
/*  菜農HotPower@126.com  2008.5.27  于西安大雁塔菜地                                                 */
/*-------------------------------------------------------------------------------------------------------*/
/* This is a simple project that will call
* functions from an external DLL */
//#define  __cplusplus
#include
#include //需要的API函數實際在winbase.h中定義
#include    /* Needed if linking in external compiler; harmless otherwise */
#include
#include
#include "mydll.h"
/*-------------------------------------------------------------------------------------------------------*/
typedef long int DLLEXPORT (*DLLCdeclFunction)(char *);//定義函數指針
/*-------------------------------------------------------------------------------------------------------*/
int status;
char message[80];
int main (int argc, char *argv[])
{
/*-------------------------------------------------------------------------------------------------------*/
HMODULE hinstLib;
DLLCdeclFunction DLLFunction;
BOOL fFreeResult, fRunTimeLinkSuccess = FALSE;
/*-------------------------------------------------------------------------------------------------------*/
if (InitCVIRTE (0, argv, 0) == 0) /* Needed if linking in external compiler; harmless otherwise */
      return -1; /* out of memory */
/* Tell the dll to run it's user interface */
RunDllUI();

/*-------------------------------------------------------------------------------------------------------*/
// Get a handle to the DLL module.
hinstLib = LoadLibrary("mydll.dll");//裝載動態(tài)鏈接庫mydll.dll
// If the handle is valid, try to get the function address.
if (hinstLib != NULL)//成功裝載動態(tài)鏈接庫mydll.dll
{
   DLLFunction = (DLLCdeclFunction)GetProcAddress(hinstLib, (LPCSTR)"MyDLLCdeclFunction");//取函數指針地址
         // If the function address is valid, call the function.
   if (fRunTimeLinkSuccess = (DLLFunction != NULL))//dll中有函數MyDLLCdeclFunction()
{
         Fmt(message, "message via DLL function\n");
         status = (long int)DLLFunction (message);//調用dll函數!!!
}
         // Free the DLL module
   fFreeResult = FreeLibrary(hinstLib);//卸載動態(tài)鏈接庫mydll.dll
}
// If unable to call the DLL function, use an alternative
if (! fRunTimeLinkSuccess)
{
   Fmt(message, "message via alternative method\n");
MessagePopup ("CVI MessagePopup ", message);
}
/*-------------------------------------------------------------------------------------------------------*/
點擊下載工程源碼: cvidlldemo.rar

作者: cyber211 時間: 2009-6-28 23:10
還在用LabWindows/CVI啊，換Labview，不用編代碼了

作者: f.luo 時間: 2010-5-25 22:20
頂一下

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