How to load a dll resource dialog box at an application Dialog box (怎么在一个应用程序对话框动态加载DLL里的资源对话框)

本文链接：https://blog.youkuaiyun.com/crazyhuman/article/details/6027565

本文介绍了如何在MFC应用程序中动态加载DLL资源对话框。通过创建DLL资源对话框文件，定义全局应用程序对象并设置接口函数showDlg，实现了DLL对话框的调用。在主应用程序中，通过LoadLibrary和GetProcAddress函数找到并执行DLL中的showDlg函数，从而显示DLL资源对话框。

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This afternoon,although I have had a little out of my mind.I am so excited because I learned a lot MFC intellectal points from a bit topic. I have handled how to load a dll resource at an application Dialog box successfully.Before this,I checked it out for a long time, I read papers about Dll resource dialog box and how to call it dynamicaly.I can do this as following code to bring about purpose:

The Dll dialob box define like this:

By default,I think you have created a dll dll resource dialog box file,so here,I just only add portion of main code.

    #include "myDllResource.h"         //the dll resource dialog box header file.
   CDllResourceApp theApp;             //the global object of application procedure.
void __stdcall showDlg()                // call dll dialog box function .
{
AFX_MANAGE_STATE(AfxGetStaticModuleState());
myDllResource dlg;
UINT iResult = dlg.DoModal();
}

showDlg function is an interface function and you must define it in the main application procedure. You also need to create *.def file as exported function (showDlg) template like this:

; DllResource.def : Declares the module parameters for the DLL.

LIBRARY "DllResource"
DESCRIPTION 'DllResource Windows Dynamic Link Library'

EXPORTS
; Explicit exports can go here
showDlg

This file,you must define it at dll application file containing source files of DLL. Next,you should create a dialog box (exe) and add a button on the dialog Form to call dll resource dialog box.I know you a very smart to create this.the main part of code like this:

     void CDemoDllDlg::OnCall()
{
// TODO: Add your control notification handler code here
typedef void (__stdcall *lpFun)(void);          //function pointer
    HINSTANCE hDll; //DLL handle(句柄)
CString dllPath;
CString resPath;
char fullPath[MAX_PATH];
ZeroMemory(fullPath,sizeof(fullPath));
::GetModuleFileName(AfxGetInstanceHandle(),fullPath,MAX_PATH);
resPath.Format(_T("%s"),fullPath);
resPath = resPath.Left(resPath.ReverseFind('//')+1);
dllPath = resPath + _T("DllResource.dll");
    hDll = LoadLibrary(dllPath);
    if (hDll == (HINSTANCE)HINSTANCE_ERROR)
{
  MessageBox("Loading DLL failed!");
}

     lpFun pShowDlg;
pShowDlg = (lpFun)GetProcAddress(hDll,"showDlg");
    if (NULL==pShowDlg)
{
      MessageBox("Searching DLL function failed!");
}
    pShowDlg(); //call a dll resource dialog box by a function adddress.

}

I am so tired today~~!