如何在另一个项目中从dll中调用dialogBox（Win32API） [英] how to Invoke dialogBox (Win32API) from within dll in another project

问题描述

你好，有人可以建议我如何在我的dll项目中定义DialogInvoke函数，这是我的工作代码，我在dll中编译它并想在另一个项目中使用DialogInvoke函数

hello can somebody advice me about how should i define the DialogInvoke function in my dll project, here is my working code, i compiled it in dll and want to use the DialogInvoke function in another project

#include<windows.h>
#include<windowsx.h>
#include<commctrl.h>
#include<shlobj.h>

#include "resource.h"

//Handles for the windows
HWND hdialog;
HINSTANCE ghInstance;
HWND edit;
//Folder Name that has been selected
TCHAR FolderName[MAX_PATH];
TCHAR c[MAX_PATH];
//Return value of the SHGetPathFromIDList
BOOL t;



void SetFont(HWND hwnd,LPTSTR FontName,int FontSize)
{
	
	HFONT hf;
	LOGFONT lf={0};
	HDC hdc=GetDC(hwnd);
	
	GetObject(GetWindowFont(hwnd),sizeof(lf),&lf);
	lf.lfWeight = FW_REGULAR;
	lf.lfHeight = (LONG)FontSize;
	lstrcpy( lf.lfFaceName, FontName );
	hf=CreateFontIndirect(&lf);
	SetBkMode(hdc,OPAQUE);
	SendMessage(hwnd,WM_SETFONT,(WPARAM)hf,TRUE);
	ReleaseDC(hwnd,hdc);
   
}


int __stdcall BrowseCallbackProc(HWND  hwnd,UINT  uMsg,LPARAM  lParam,LPARAM  lpData)
{


	if(uMsg==BFFM_INITIALIZED)
	{
		
		RECT ListViewRect,Dialog;
	
		edit=CreateWindowEx(0,"EDIT","",WS_CHILD|WS_VISIBLE|WS_BORDER|ES_AUTOHSCROLL,0,100,100,50,hwnd,0,ghInstance,NULL);
		HWND caption=CreateWindowEx(0,"STATIC","You have selected the folder :",WS_CHILD|WS_VISIBLE|WS_CLIPCHILDREN,0,100,100,50,hwnd,0,ghInstance,NULL);
		HWND ListView=FindWindowEx(hwnd,NULL,"SysTreeView32",NULL);

		
		GetWindowRect(hwnd,&Dialog);
		GetWindowRect(ListView,&ListViewRect);

		
		SetWindowPos(ListView,0,(ListViewRect.left-Dialog.left) ,(ListViewRect.top-Dialog.top )-20,290,170,0);
	
		SetWindowPos(edit,HWND_BOTTOM,(ListViewRect.left-Dialog.left),(ListViewRect.top-Dialog.top )+170,290,18,SWP_SHOWWINDOW);
		SetWindowPos(caption,HWND_BOTTOM,(ListViewRect.left-Dialog.left),(ListViewRect.top-Dialog.top )+155,290,14,SWP_SHOWWINDOW);
        



	
		SetFont(caption,"MS Sans Serif",12);
		SetFont(edit,"MS Sans Serif",12);
		
	}

	
	if  (uMsg==BFFM_SELCHANGED)
	{
		t = SHGetPathFromIDList((ITEMIDLIST*)lParam, c);
            
		
		SetWindowText(edit,c);
		
    }
	
	return 0;
}


BOOL CALLBACK MainDlgProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	if(message==WM_QUIT||message==WM_CLOSE)
		PostQuitMessage(0);

	if(message==WM_INITDIALOG)
	{
		
		hdialog=hDlg;
		
		RECT rc;

		GetWindowRect(hDlg,&rc); 
		int w=rc.right-rc.left, h=rc.bottom-rc.top;
		int cx=GetSystemMetrics(SM_CXSCREEN)/2, cy=GetSystemMetrics(SM_CYSCREEN)/2;
		MoveWindow(hDlg,cx-w/2,cy-h/2,w,h,FALSE);
		SendMessage(hDlg, WM_COMMAND, IDOK, 0);
		SendMessage(hDlg, WM_COMMAND, IDCANCEL, 0);
      
	}

	if(message==WM_COMMAND)
	{
		if((LOWORD(wParam))==IDOK)
		{
			
			TCHAR dname[MAX_PATH];
			IMalloc *imalloc; SHGetMalloc(&imalloc);
			BROWSEINFO bi; ZeroMemory(&bi,sizeof(bi));
			   
			bi.hwndOwner=hDlg;
			bi.pszDisplayName=dname;
			bi.lpszTitle = TEXT("Choose Directory");
			   
			#define BIF_NONEWFOLDERBUTTON  0x0200
			   
			bi.ulFlags = BIF_NONEWFOLDERBUTTON|BIF_RETURNONLYFSDIRS;
			bi.lpfn = BrowseCallbackProc;
			ITEMIDLIST *pidl = SHBrowseForFolder(&bi);
               
			   
			if (pidl!=NULL)
				MessageBox(hDlg,c,"Selected Folder",0);
			
			
			
		//	SendMessage(hDlg, WM_COMMAND, IDCANCEL, 0);
	
			
			

			imalloc->Free(pidl);
			imalloc->Release();
			

		}

		if((LOWORD(wParam))==IDCANCEL)
		{
			
			PostQuitMessage(0);
			
			EndDialog(hDlg,0);
		}
	}
			
	return 0;

}





extern "C" __declspec (dllexport) int DialogInvoke ( )
{
   DialogBox(ghInstance,MAKEINTRESOURCE(IDD_DIALOG1),NULL,MainDlgProc);
   return 0;
}



//Main window
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)
{
	//InitCommonControls();
	ghInstance=hInstance;
	//DialogBox(hInstance,MAKEINTRESOURCE(IDD_DIALOG1),NULL,MainDlgProc);
	//DialogInvoke ( ) ;
	return 0;
	
}

是这个编码我想要使用的函数的正确定义？

is this code a proper definition of the function i want to use?

extern "C" __declspec (dllexport) int DialogInvoke ( )
{
   DialogBox(ghInstance,MAKEINTRESOURCE(IDD_DIALOG1),NULL,MainDlgProc);
   return 0;
}

问题是对话框没有从另一个项目弹出，但它本身工作正常。

the problem is the dialog doesn't pop up from another project , but it's working fine by itself.

推荐答案

您需要添加 DllMain 函数，如 http://msdn.microsoft.com/en-us/library/windows/desktop/ms682583（v = vs.85）的.aspx [ ^ ]在 ghInstance 中设置正确的值。由于系统无法找到对话框资源，因此您的调用将失败。

You need to add a DllMain function, as described in http://msdn.microsoft.com/en-us/library/windows/desktop/ms682583(v=vs.85).aspx[^] to set the correct value in ghInstance. As it stands your call will fail because the system cannot find the dialog resource.

问题已修复，完整答案在此处

http://cboard.cprogramming.com/c-programming/111737-dialogbox-within-dll-2.html [ ^ ]

problem fixed, the complete answer is here
http://cboard.cprogramming.com/c-programming/111737-dialogbox-within-dll-2.html[^]

好的，谢谢我试试，希望原因在于

ok thanks i'll try,hope the reason lies there

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