user: Set DDE errors in some failing cases.

dlls/user/dde_client.c

@@ -1166,7 +1166,7 @@ HDDEDATA WINAPI DdeClientTransaction(LPBYTE pData, DWORD cbData, HCONV hConv, HS
 	pXAct = WDML_ClientQueueRequest(pConv, wFmt, hszItem);
 	break;
     default:
-	FIXME("Unknown transation\n");
+        FIXME("Unknown transaction type %04x\n", wType);
 	/* unknown transaction type */
 	pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
 	goto theError;
@@ -1187,6 +1187,7 @@ HDDEDATA WINAPI DdeClientTransaction(LPBYTE pData, DWORD cbData, HCONV hConv, HS
 	pConv->wStatus &= ~ST_CONNECTED;
 	WDML_UnQueueTransaction(pConv, pXAct);
 	WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
+        pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
 	goto theError;
     }
     pXAct->dwTimeout = dwTimeout;
@@ -1393,10 +1394,16 @@ BOOL WINAPI DdeDisconnect(HCONV hConv)
                     LeaveCriticalSection(&WDML_CritSect);
                 if (PostMessageW(pConv->hwndServer, pXAct->ddeMsg,
                                  (WPARAM)pConv->hwndClient, pXAct->lParam))
+                {
                     WDML_SyncWaitTransactionReply(hConv, 10000, pXAct, NULL);
+                    ret = TRUE;
+                }
                 for (i = 0; i < count; i++)
                     EnterCriticalSection(&WDML_CritSect);
-                ret = TRUE;
+
+                if (!ret)
+                    pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
+
                 WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
                 /* still have to destroy data assosiated with conversation */
                 WDML_RemoveConv(pConv, WDML_CLIENT_SIDE);

dlls/user/dde_misc.c

@@ -1924,12 +1924,14 @@ WDML_CONV*	WDML_GetConv(HCONV hConv, BOOL checkConnected)
 
     if (checkConnected && !(pConv->wStatus & ST_CONNECTED))
     {
-	FIXME("found conv but ain't connected\n");
+        WARN("found conv but ain't connected\n");
+        pConv->instance->lastError = DMLERR_NO_CONV_ESTABLISHED;
 	return NULL;
     }
     if (!pConv->instance || GetCurrentThreadId() != pConv->instance->threadID)
     {
-	FIXME("wrong thread ID\n");
+        WARN("wrong thread ID\n");
+        pConv->instance->lastError = DMLERR_INVALIDPARAMETER; /* FIXME: check */
 	return NULL;
     }
 
@@ -1980,6 +1982,7 @@ BOOL		WDML_PostAck(WDML_CONV* pConv, WDML_SIDE side, WORD appRetCode,
     if (!PostMessageW(to, WM_DDE_ACK, (WPARAM)from, lParam))
     {
 	pConv->wStatus &= ~ST_CONNECTED;
+        pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
         FreeDDElParam(WM_DDE_ACK, lParam);
         return FALSE;
     }

dlls/user/dde_server.c

@@ -136,6 +136,7 @@ BOOL WINAPI DdePostAdvise(DWORD idInst, HSZ hszTopic, HSZ hszItem)
 		{
 		    ERR("post message failed\n");
                     pConv->wStatus &= ~ST_CONNECTED;
+                    pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
 		    if (!WDML_IsAppOwned(hDdeData))  DdeFreeDataHandle(hDdeData);
 		    GlobalFree(hItemData);
 		    goto theError;
@@ -587,6 +588,7 @@ static	WDML_QUEUE_STATE WDML_ServerHandleRequest(WDML_CONV* pConv, WDML_XACT* pX
 			      ReuseDDElParam(pXAct->lParam, WM_DDE_REQUEST, WM_DDE_DATA,
 					     (UINT_PTR)hMem, (UINT_PTR)pXAct->atom)))
 	    {
+                pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
 		DdeFreeDataHandle(hDdeData);
 		GlobalFree(hMem);
 		fAck = FALSE;