Everything

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.

Remarks

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


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