scdde.c

PGP8.0源码 请认真阅读您的文件包然后写出其具体功能

/*__________________________________________________________________________
 Copyright (C) 2002 PGP Corporation
 All rights reserved.
 
 $Id: SCdde.c,v 1.6 2002/10/29 20:14:07 wjb Exp $
__________________________________________________________________________*/
#include "precomp.h"
#include <ddeml.h>

HDDEDATA CALLBACK myDdeCallback(UINT type,UINT fmt,HCONV hconv,
                                HSZ hsz1, HSZ hsz2, HDDEDATA hData,
								DWORD dwData1, DWORD dwData2)
{
	return NULL;
}

void InitPGPlogDDE(DWORD *pidInst)
{
	DdeInitialize(pidInst,(PFNCALLBACK) myDdeCallback,
		CBF_SKIP_ALLNOTIFICATIONS,0);
}

void UninitPGPlogDDE(DWORD idInst)
{
	DdeUninitialize(idInst);
}

BOOL PGPLogWindowExists (LPSTR lpszClassName, LPSTR lpszWindowTitle) 
{
	HWND hWndMe;

   	hWndMe = FindWindow (lpszClassName, lpszWindowTitle);
    if (hWndMe) 
    {
		if (!IsZoomed (hWndMe)) 
			ShowWindow (hWndMe, SW_RESTORE);
		SetWindowPos( hWndMe,HWND_TOP,0,0,0,0,
			SWP_NOMOVE|SWP_NOACTIVATE|SWP_NOSIZE);
        return TRUE;
	}  
	else
		return FALSE;
}

BOOL PGPscSendPGPlogMsg(HWND hwnd,char* szMsg)
{
	HSZ hszServName;
	HSZ hszSysTopic;
	HCONV hConv;         // conversation handle 
	HDDEDATA hdded;
	HDDEDATA ddemsg;
	DWORD idInst;
	char StrRes[500];
	int error;
  
	if(!PGPLogWindowExists (DDElogServer,DDElogServer))
	{            
		char PGPlog[MAX_PATH];
		FILE *ftest;
		BOOL bLogOK;

		PGPscPGPpath(PGPlog);
		strcat(PGPlog,DDElogServer);
		strcat(PGPlog,".exe");

//		For testing only
//		strcpy(PGPlog,"e:\\mars\\build\\win32\\debug\\PGPlog.exe");

		bLogOK=FALSE;

		// This is necessary to prevent OS from showing its own
		// can't find PGPlog during PGPclExecute. 
		ftest=fopen(PGPlog,"rb");

		if(ftest!=0)
		{
			fclose(ftest);

			bLogOK=PGPclExecute(PGPlog,SW_SHOWNA);
		}

		if(!bLogOK)
		{
			LoadString (g_hinst, IDS_CANTLOCATELOG, StrRes, sizeof(StrRes));

			MessageBox(hwnd,szMsg,StrRes,
				MB_ICONEXCLAMATION|MB_OK|MB_SETFOREGROUND);
			return FALSE;
		}
	}
	
	// Sigh... just in case log gets stuck in a silly
	// can't find memlock driver message box, we'll wait
	// here until the user lets log through
	while(!PGPLogWindowExists (DDElogServer,DDElogServer))
	{
		Sleep(500);
	}

	idInst=0;

	InitPGPlogDDE(&idInst);

	hszServName = DdeCreateStringHandle(idInst,DDElogServer,CP_WINANSI);
	hszSysTopic = DdeCreateStringHandle(idInst,DDElogTopic,CP_WINANSI);

	ddemsg=DdeCreateDataHandle(idInst,szMsg,strlen(szMsg)+1,0,0L,CF_TEXT,0);

	hConv = DdeConnect(idInst,hszServName,hszSysTopic,(PCONVCONTEXT) NULL);

	if(hConv==NULL)
	{              
		error=DdeGetLastError(idInst);
		UninitPGPlogDDE(idInst);
		LoadString (g_hinst, IDS_CANTCONNECTLOG, StrRes, sizeof(StrRes));

		MessageBox(hwnd,szMsg,StrRes,
			MB_ICONEXCLAMATION|MB_OK|MB_SETFOREGROUND);
		return FALSE;
	}

	hdded = DdeClientTransaction((void *)ddemsg,0xFFFFFFFF,
		hConv,(UINT)0, (UINT)0, XTYP_EXECUTE, TIMEOUT_ASYNC, NULL);

	DdeDisconnect(hConv);

	UninitPGPlogDDE(idInst);

	if(hdded==0)
	{
		LoadString (g_hinst, IDS_CANTTRANSMITLOG, StrRes, sizeof(StrRes));
		MessageBox(hwnd,szMsg,StrRes,
			MB_ICONEXCLAMATION|MB_OK|MB_SETFOREGROUND);
		return FALSE;
	}

	return TRUE;
}


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