（Ida Pro）找出哪些函数使用导入符号

Question

I am new to Ida and I need to use it to identify which functions within the executable call one of these. I am trying to find a way a packet is encrypted as a security exercise. Lets say I want to look at the imports window and see these, does that mean that those are the only functions referenced in the executable? How can I find where sendto is referenced? I tried to search it by name but the search takes forever and does not seem to find anything.

Address Ordinal Name Library
------- ------- ---- -------
0109150C 111 imp_WSAGetLastError WS2_32
01091524 101 __imp_WSAAsyncSelect WS2_32
0109157C freeaddrinfo WS2_32
01091578 getaddrinfo WS2_32
01091548 57 __imp_gethostname WS2_32
01091518 52 __imp_gethostbyname WS2_32
01091530 23 __imp_socket WS2_32
01091528 21 __imp_setsockopt WS2_32
01091554 20 sendto WS2_32
0109154C 19 __imp_send WS2_32
01091574 18 __imp_select WS2_32
01091558 17 recvfrom WS2_32
01091550 16 __imp_recv WS2_32
01091508 15 __imp_ntohs WS2_32
01091514 14 ntohl WS2_32
01091540 13 __imp_listen WS2_32
0109151C 12 __imp_inet_ntoa WS2_32
01091520 11 __imp_inet_addr WS2_32
01091580 10 __imp_ioctlsocket WS2_32
01091568 115 __imp_WSAStartup WS2_32
01091538 9 __imp_htons WS2_32
01091534 3 __imp_closesocket WS2_32
0109152C WSAIoctl WS2_32
01091510 8 htonl WS2_32
01091570 151 __imp _WSAFDIsSet WS2_32
0109155C 7 getsockopt WS2_32
0109153C 2 __imp_bind WS2_32
01091564 6 getsockname WS2_32
01091560 5 getpeername WS2_32
01091544 1 __imp_accept WS2_32
01091584 4 __imp_connect WS2_32
0109156C 116 __imp_WSACleanup WS2_32

Answer 1

If you want to find where the imported function is used, I have in the Import view this MessageBoxA function:

00406160  MessageBoxA USER32

double click on it, it will gets you to the IDA View and you will see something like:

.idata:00406160 ; int __stdcall MessageBoxA(HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, UINT uType)
.idata:00406160                 extrn __imp_MessageBoxA:dword ; DATA XREF: MessageBoxA^r

click on the function name, MessageBoxA , it will becomes yellow, then click X on the keyboard or right click on the function and then choose Jump to xref to operand ... . You will go to where the function is used or you will see dialog box if it's called from more than one place.