Analysis on the Development Principle of C-Interface for Stock Trading

The development and use of the c-interface for stock trading is based on the principle of automatic order placement based on stock market software data, and then integrates information as the basis of trading strategies. All trading behaviors are automated. Moreover, when traders use the c interface of stock trading, it is actually written by code. In this respect, java language, Python, c language, etc. can be used for development. In this regard, next, the editor will talk about the development concept related to the stock trading interface , so that more traders can master the interface principle, carry out secondary development, or master the knowledge of these quantitative transactions.

For example, the development document of the stock trading c interface:

(1) Description of stock interface API call: 

	name	Function
basic function	Init	API initialization
	Deinit	API deinitialization
	Logon	Login to trading account
	logoff	Log out of trading account
	QueryData	Query various transaction data
	QueryHistoryData	Query various historical data
	SendOrder	Order
	CancelOrder	Order Cancellation
	GetQuote	Get five quotes
	Repay	Margin and securities lending account direct repayment
	GetExpireDate	Query API authorization expiration date
Single Account Batch Function	QueryDatas	Single-account batch query of various transaction data
	SendOrders	Single account batch order
	CancelOrders	Single account batch cancellation
	GetQuotes	Get five quotes in batches for a single account
Multi-account batch function	QueryMultiAccountsDatas	Multi-account batch query of various transaction data
	SendMultiAccountsOrders	Batch orders for multiple accounts
	CancelMultiAccountsOrders	Multi-account batch cancellation
	GetMultiAccountsQuotes	Get five quotes in batches for multiple accounts

(2) The principle of transaction interface querying various transaction data:

sign	void QueryData(int		ClientId, int Category,	char* Result, char*	ErrorInfo);
Function	Query various transaction data
parameter	ClientId	Client ID
	Category	Query Information Category 0: Funds, 1: Shares, 2: Order of the day, 3: Transaction of the day, 4: Cancellation order, 5: Shareholder code, 6: Financing balance, 7: Securities lending balance, 8: Marginable securities, 9: Different securities companies, 10-11: None, 12: Inquiry about new shares available for subscription, 13: Inquiry about subscription quota for new shares, 14: Matching Number Query, 15: Winning Lottery Query
	Result	Query results, need to allocate 1024*1024 bytes of space Please refer to [Result format] for the format
	ErrorInfo	Error message, need to allocate 256 bytes of space
return value	None, whether the query is successful or not is judged by whether ErrorInfo is an empty string

The header file type of the stock trading c interface development document:

public int getResultCode() {
  return this.resultCode;
 }
 
 public void setResultCode(int value) {
  this.resultCode = value;
 }
 
 public String getResultMsg() {
  return this.resultMsg;
 }
 
 public void setResultMsg(String value) {
  this.resultMsg = value;
 }

In other words, the stock trading c interface can also mine various data languages, but if you want to obtain subdivided data, you can develop the program through programming, and just input it directly. It plays a very important role in the automatic trading process in the quantitative field. key role.