Win32 Dyanmic-Link Library的调用LoadLibrary关键点
LoadLibrary
TheLoadLibraryfunction maps the specified executable module into the address space of the calling process.
For additional load options, use theLoadLibraryExfunction.
HMODULE LoadLibrary(
LPCTSTRlpFileName// file name of module
);
GetProcAddress
TheGetProcAddressfunction retrieves the address of the specified exported dynamic-link library (DLL) function.
FARPROC GetProcAddress(
HMODULEhModule,// handle to DLL module
LPCSTRlpProcName// function name
);
FreeLibrary
TheFreeLibraryfunction decrements the reference count of the loaded dynamic-link library (DLL). When the reference count reaches zero,
the module is unmapped from the address space of the calling process and the handle is no longer valid.
BOOL FreeLibrary(
HMODULEhModule// handle to DLL module
);
实现过程
1.新建1个 MFC AppWizard（exe）项目，Project name:MFC01
2.选中Dialog Base对话框类型的程序。
3.删除多余的控件，添加1个按钮，编译一下。
4.将project01 Debug里面的project01.dll复制到MFC01的Debug目录下；
5.调用dll代码如下
|
voidCMfc01Dlg::OnButton1(){HMODULEhModule=LoadLibrary("project01.dll");typedef int (*Function)(intx,inty);if (hModule){FunctionFuc=(Function)GetProcAddress(hModule,"add");if (Fuc){CStrings;s.Format("3+1=%d",Fuc(3,1));MessageBox(s);}FreeLibrary(hModule);}} |
图
备注
注:LoadLibrary与只能调用 DLL 里面带 extern "C"的ADDPROC是一个变量ADDPROC SUB= (ADDPROC)GetProcAddress(hModule,"sub");如果调用Windows的Dlltypedef int (Function)(intx,inty);修改为typedef int (WINAPIFunction)(intx,inty);本例的DLL代码1.创建1个 Win32 Dyanmic-Link Library ,Project name:project012.选中 An empty DLL project.3.Ctrl+N 新建一个 C++ Source File ，File：project01Win32 Dyanmic-Link Library的创建
|
extern"C"__declspec(dllexport) intadd(intx,inty){returnx+y;}extern"C"__declspec(dllexport) int sub(intx,inty){returnx-y;} |
相关链接
附件列表
原文链接: https://www.cnblogs.com/xe2011/archive/2013/02/23/2923671.html
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