delay

[1248]

Hello , I am beginer in c++ as i started few days ago and i find it hard to understand most of syntax.

What i should use to make part of code do a calculation 1 time and after that not repeat actions?
What should i use to make part of code to repeat itself?
I am trying to make a widely customizable delay timer of 3sec out of QueryPerformanceFreqency and QueryPerformanceCounter by first calculating QueryPerformanceFreqency*3+QueryPerformanceCounter , then not repetaing it anymore and later it should start to compare results from QueryPerformanceFreqency*3+QueryPerformanceCounter to QueryPerformanceCounter. So if value becaomes bigger it would start to do delayed task.

program, it compiles under visual studio 2010 but i am not able to make a delay as i was hoping for because of too little understanding how to manipulate values in code.

idea is that by pressing checkbox1 it would make aaaaaaa appear with 3sec delay.

#pragma once
#include <iostream>
#include <windows.h>                // for Windows APIs

namespace timerfinal {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	/// <summary>
	/// Summary for Form1
	/// </summary>
	public ref class Form1 : public System::Windows::Forms::Form
	{
	public:
		Form1(void)
		{
			InitializeComponent();
			//
			//TODO: Add the constructor code here
			//
		}

	protected:
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		~Form1()
		{
			if (components)
			{
				delete components;
			}
		}
	private: System::Windows::Forms::CheckBox^  checkBox1;
	private: System::Windows::Forms::Label^  label1;
	protected: 

	private:
		/// <summary>
		/// Required designer variable.
		/// </summary>
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		void InitializeComponent(void)
		{
			this->checkBox1 = (gcnew System::Windows::Forms::CheckBox());
			this->label1 = (gcnew System::Windows::Forms::Label());
			this->SuspendLayout();
			// 
			// checkBox1
			// 
			this->checkBox1->AutoSize = true;
			this->checkBox1->Location = System::Drawing::Point(44, 12);
			this->checkBox1->Name = L"checkBox1";
			this->checkBox1->Size = System::Drawing::Size(80, 17);
			this->checkBox1->TabIndex = 0;
			this->checkBox1->Text = L"checkBox1";
			this->checkBox1->UseVisualStyleBackColor = true;
			this->checkBox1->CheckedChanged += gcnew System::EventHandler(this, &Form1::checkBox1_CheckedChanged);
			// 
			// label1
			// 
			this->label1->AutoSize = true;
			this->label1->Location = System::Drawing::Point(41, 32);
			this->label1->Name = L"label1";
			this->label1->Size = System::Drawing::Size(35, 13);
			this->label1->TabIndex = 1;
			this->label1->Text = L"label1";
			// 
			// Form1
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(158, 77);
			this->Controls->Add(this->label1);
			this->Controls->Add(this->checkBox1);
			this->Name = L"Form1";
			this->Text = L"Form1";
			this->ResumeLayout(false);
			this->PerformLayout();

		}
#pragma endregion
	private: System::Void checkBox1_CheckedChanged(System::Object^  sender, System::EventArgs^  e) {






{
    LARGE_INTEGER freq;            // ticks per second
    LARGE_INTEGER time;            //count+needed time   
    LARGE_INTEGER count;           //all ticks

      // get ticks per second
    QueryPerformanceFrequency(&freq);
	  // count for ending
    QueryPerformanceCounter(&count);
      //ticks needed
    time.QuadPart = (freq.QuadPart*3) + count.QuadPart;      
    
    while (count.QuadPart >= time.QuadPart){             
    label1->Text = "aaaaaaaaa";
            }
}









			 }
	};
}

problem is in this part, i was hoping it to work as delay.

as far as i am able to understrand
QueryPerformanceFrequency should mean how many numbers per sec
QueryPerformanceCounter should be how many numbers have passed


i am not sure how to make it compare (count.QuadPart >= time.QuadPart) so if value becomes equal or bigger it would do task.

time.QuadPart = (freq.QuadPart*3) + count.QuadPart;
this calculation may only be needed once , i am not sure but maybe this repeats itself with my current code.

Sleep() freezes all, tryed to understand others as well but too complicated to understand.

{
    LARGE_INTEGER freq;            // ticks per second
    LARGE_INTEGER time;            //count+needed time   
    LARGE_INTEGER count;           //all ticks

      // get ticks per second
    QueryPerformanceFrequency(&freq);
	  // count for ending
    QueryPerformanceCounter(&count);
      //ticks needed
    time.QuadPart = (freq.QuadPart*3) + count.QuadPart;      
    
    while (count.QuadPart >= time.QuadPart){             
    label1->Text = "aaaaaaaaa";
            }
}