Everything_IsQueryReply
The
Everything_IsQueryReply function checks if the specified window message is a query reply.
Syntax
BOOL EVERYTHINGAPI Everything_IsQueryReply(
UINT message,
WPARAM wParam,
LPARAM lParam,
DWORD nId
);
Parameters
- message
- Specifies the message identifier.
- wParam
- Specifies additional information about the message.
- lParam
- Specifies additional information about the message.
- nId
- The unique identifier specified with Everything_SetReplyID, or 0 for the default ID.
This is the value used to compare with the dwData member of the COPYDATASTRUCT if the message is WM_COPYDATA.
Return Value
Returns TRUE if the message is a query reply.
If the function fails the return value is FALSE. To get extended error information, call:
Everything_GetLastError.
This function checks if the message is a WM_COPYDATA message. If the message is a WM_COPYDATA message the function checks if the ReplyID matches the dwData member of the COPYDATASTRUCT. If they match the function makes a copy of the query results.
You must call Everything_IsQueryReply in the windows message handler to check for an IPC query reply if you call Everything_Query with bWait set to FALSE.
If the function returns TRUE you should return TRUE.
If the function returns TRUE you can call the following functions to read the results:
Example
LRESULT CALLBACK WindowProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
if (Everything_IsQueryReply(uMsg,wParam,lParam,0))
{
// ...
// do something with the results..
// ...
return TRUE;
}
// return the default window proc..
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
Implementation
BOOL EVERYTHINGAPI Everything_IsQueryReply(UINT message,WPARAM wParam,LPARAM lParam,DWORD nId)
{
if (message == WM_COPYDATA)
{
COPYDATASTRUCT *cds = (COPYDATASTRUCT *)lParam;
if (cds)
{
if (cds->dwData == _Everything_ReplyID)
{
if (_Everything_IsUnicodeQuery)
{
if (_Everything_List) HeapFree(GetProcessHeap(),0,_Everything_List);
_Everything_List = (EVERYTHING_IPC_LISTW *)HeapAlloc(GetProcessHeap(),0,cds->cbData);
if (_Everything_List)
{
CopyMemory(_Everything_List,cds->lpData,cds->cbData);
}
else
{
_Everything_LastError = EVERYTHING_ERROR_MEMORY;
}
return TRUE;
}
else
{
if (_Everything_List) HeapFree(GetProcessHeap(),0,_Everything_List);
_Everything_List = (EVERYTHING_IPC_LISTW *)HeapAlloc(GetProcessHeap(),0,cds->cbData);
if (_Everything_List)
{
CopyMemory(_Everything_List,cds->lpData,cds->cbData);
}
else
{
_Everything_LastError = EVERYTHING_ERROR_MEMORY;
}
return TRUE;
}
}
}
}
return FALSE;
}
See Also
