Zi 字媒體
2017-07-25T20:27:27+00:00
code blocks 撰寫DLL和動態載入使用
資料來源:
01.https://helloacm.com/tutorial-create-a-sample-dll-project-using-codeblocks-ide-in-cc/
02.http://www.infernodevelopment.com/simple-c-dll-loading-message-box
GITHUB專案檔:https://github.com/jash-git/code-blocks-DLL-
DLL_H
#ifndef __MAIN_H__
#define __MAIN_H__
#include
/* To use this exported function of dll, include this header
* in your project.
*/
#ifdef BUILD_DLL
#define DLL_EXPORT __declspec(dllexport)
#else
#define DLL_EXPORT __declspec(dllimport)
#endif
#ifdef __cplusplus
extern “C”
{
#endif
void DLL_EXPORT SomeFunction(const LPCSTR sometext);
#ifdef __cplusplus
}
#endif
#endif // __MAIN_H__
DLL_C
#include “main.h”
//資料來源:https://helloacm.com/tutorial-create-a-sample-dll-project-using-codeblocks-ide-in-cc/
// a sample exported function
void DLL_EXPORT SomeFunction(const LPCSTR sometext)
{
MessageBoxA(0, sometext, “DLL Message”, MB_OK | MB_ICONINFORMATION);
}
extern “C” DLL_EXPORT BOOL APIENTRY DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
switch (fdwReason)
{
case DLL_PROCESS_ATTACH:
// attach to process
// return FALSE to fail DLL load
break;
case DLL_PROCESS_DETACH:
// detach from process
break;
case DLL_THREAD_ATTACH:
// attach to thread
break;
case DLL_THREAD_DETACH:
// detach from thread
break;
}
return TRUE; // succesful
}
EXE_C
#include
//–
//http://www.infernodevelopment.com/simple-c-dll-loading-message-box
#include
typedef void (*FuncPtr)(LPCTSTR);
//–
using namespace std;
int main()
{
cout << “Hello world!” << endl;
FuncPtr myDllFunc;
BOOL linkSuccessFlag = FALSE, fFreeResult;
HINSTANCE hinstLib = LoadLibrary(“CB_DLL.dll”);
if (hinstLib != NULL) {
myDllFunc = (FuncPtr) GetProcAddress(hinstLib, “SomeFunction”);
if (myDllFunc != NULL)
{
linkSuccessFlag = TRUE;
myDllFunc(“Hello, World! by jash”);
}
fFreeResult = FreeLibrary(hinstLib);
}
system(“pause”);
return 0;
}
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