Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>From MS Platform SDK: "A client can request a hot advise loop with a server by specifying the XTYP_ADVSTART transaction type in a call to DdeClientTransaction".</p> <pre><code>//#include "stdafx.h" #include "windows.h" #include "ddeml.h" #include "stdio.h" char szApp[] = "EXCEL"; char szTopic[] = "C:\\Test.xls"; char szCmd1[] = "[APP.MINIMIZE()]"; char szItem1[] = "R1C1"; char szDesc1[] = "A1 Contains: "; char szItem2[] = "R2C1"; char szDesc2[] = "A2 Contains: "; char szItem3[] = "R3C1"; char szData3[] = "Data from DDE Client"; HSZ hszApp, hszTopic; DWORD idInst=0; HDDEDATA CALLBACK DdeCallback( UINT uType, // Transaction type. UINT uFmt, // Clipboard data format. HCONV hconv, // Handle to the conversation. HSZ hsz1, // Handle to a string. HSZ hsz2, // Handle to a string. HDDEDATA hdata, // Handle to a global memory object. DWORD dwData1, // Transaction-specific data. DWORD dwData2) // Transaction-specific data. { if(uType==XTYP_ADVDATA &amp;&amp; uFmt==CF_TEXT) { HSZ hszItem1 = DdeCreateStringHandle(idInst, szItem1, 0); HSZ hszItem2 = DdeCreateStringHandle(idInst, szItem2, 0); char szResult[255]; if((!DdeCmpStringHandles(hsz1, hszTopic)) &amp;&amp; (!DdeCmpStringHandles(hsz2, hszItem1))) { DdeGetData(hdata, (unsigned char *)szResult, 255, 0); printf("%s - %s\n", szItem1,szResult); } else if((!DdeCmpStringHandles(hsz1, hszTopic)) &amp;&amp; (!DdeCmpStringHandles(hsz2, hszItem2))) { DdeGetData(hdata, (unsigned char *)szResult, 255, 0); printf("%s - %s\n", szItem2,szResult); } } return 0; } void DDEExecute(DWORD idInst, HCONV hConv, char* szCommand) { HDDEDATA hData = DdeCreateDataHandle(idInst, (LPBYTE)szCommand, lstrlen(szCommand)+1, 0, NULL, CF_TEXT, 0); if (hData==NULL) { printf("Command failed: %s\n", szCommand); } else { DdeClientTransaction((LPBYTE)hData, 0xFFFFFFFF, hConv, 0L, 0, XTYP_EXECUTE, TIMEOUT_ASYNC, NULL); } } void DDERequest(DWORD idInst, HCONV hConv, char* szItem, char* sDesc) { HSZ hszItem = DdeCreateStringHandle(idInst, szItem, 0); HDDEDATA hData = DdeClientTransaction(NULL,0,hConv,hszItem,CF_TEXT, XTYP_REQUEST,5000 , NULL); if (hData==NULL) { printf("Request failed: %s\n", szItem); } else { char szResult[255]; DdeGetData(hData, (unsigned char *)szResult, 255, 0); printf("%s%s\n", sDesc, szResult); } } void DDEPoke(DWORD idInst, HCONV hConv, char* szItem, char* szData) { HSZ hszItem = DdeCreateStringHandle(idInst, szItem, 0); DdeClientTransaction((LPBYTE)szData, (DWORD)(lstrlen(szData)+1), hConv, hszItem, CF_TEXT, XTYP_POKE, 3000, NULL); DdeFreeStringHandle(idInst, hszItem); } int main(int argc, char* argv[]) { char szCmd2[] = "[SELECT(\"R3C1\")][FONT.PROPERTIES(,\"Bold\")]";//[SAVE()][QUIT()]"; //DDE Initialization UINT iReturn; iReturn = DdeInitialize(&amp;idInst, (PFNCALLBACK)DdeCallback, APPCLASS_STANDARD | APPCMD_CLIENTONLY, 0 ); if (iReturn!=DMLERR_NO_ERROR) { printf("DDE Initialization Failed: 0x%04x\n", iReturn); Sleep(1500); return 0; } //Start DDE Server and wait for it to become idle. HINSTANCE hRet = ShellExecute(0, "open", szTopic, 0, 0, SW_SHOWNORMAL); if ((int)hRet &lt; 33) { printf("Unable to Start DDE Server: 0x%04x\n", (UINT)hRet); Sleep(1500); DdeUninitialize(idInst); return 0; } Sleep(1000); //DDE Connect to Server using given AppName and topic. HCONV hConv; hszApp = DdeCreateStringHandle(idInst, szApp, 0); hszTopic = DdeCreateStringHandle(idInst, szTopic, 0); hConv = DdeConnect(idInst, hszApp, hszTopic, NULL); DdeFreeStringHandle(idInst, hszApp); DdeFreeStringHandle(idInst, hszTopic); if (hConv == NULL) { printf("DDE Connection Failed.\n"); Sleep(1500); DdeUninitialize(idInst); return 0; } //Execute commands/requests specific to the DDE Server. DDEExecute(idInst, hConv, szCmd1); DDERequest(idInst, hConv, szItem1, szDesc1); DDERequest(idInst, hConv, szItem2, szDesc2); DDEPoke(idInst, hConv, szItem3, szData3); DDEExecute(idInst, hConv, szCmd2); HSZ hszItem = DdeCreateStringHandle(idInst, szItem1, 0); DdeClientTransaction(NULL,0,hConv,hszItem,CF_TEXT, XTYP_ADVSTART,5000 , NULL); BOOL bRet; MSG msg; while( (bRet = GetMessage( &amp;msg, NULL, 0, 0 )) != 0) { if (bRet == -1) { // handle the error and possibly exit } else { TranslateMessage(&amp;msg); DispatchMessage(&amp;msg); } } //DDE Disconnect and Uninitialize. DdeDisconnect(hConv); DdeUninitialize(idInst); Sleep(3000); return 1; } </code></pre> <p>Hope this help</p>
    singulars
    1. This table or related slice is empty.
    1. POHow to be notified of any update from Dynamic Data Exchange (DDE)?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USsteven
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload