How do I call a control that was created dynamically in c# - winforms

Question

First, a great thank you to those who asked/responded to questions. You were able to get me this far.
I wanted to help a young Belgian entrepreneur by taking on a challenge, build a Media managing software to display various media types (Images, Videos, links, text) on huge LED screens.
I have limited coding experience as I work in EDI.
My issue is that I create playlists dynamically based on the number of playlists in the DB (see screenshot), but I cannot trigger the playing of the right playlist when pressing the play button.
Warning, my code is noob code.
PlayList ScreenShot
Label playListLbl = new Label();
GroupBox playListGrp = new GroupBox();
public GroupBox addplayListGrp(int i, int start, int end)
{
GroupBox playListGrp = new GroupBox();
playListGrp.Name = "playListGrp"+ Convert.ToString(1 + i);
playListGrp.Text = "Play list " + Convert.ToString(1 + i);
playListGrp.Font = new Font("Century Gothic", 12F,
FontStyle.Regular, GraphicsUnit.Point, ((byte)(0)));
playListGrp.Width = 425;
playListGrp.Height = 525;
playListGrp.Margin = new Padding(1);
playListGrp.Location = new Point(start, end);
return playListGrp;
}
Button addPlayBtn(int i)
{
Button PlayBtn = new Button();
PlayBtn.Font = new Font("Century Gothic", 9.75F,
System.Drawing.FontStyle.Regular,
System.Drawing.GraphicsUnit.Point, ((byte)(0)));
PlayBtn.ForeColor = Color.Black;
PlayBtn.Location = new Point(10, 467);
PlayBtn.Name = "playBtn" + Convert.ToString(1 + i);
PlayBtn.Size = new Size(100, 30);
PlayBtn.TabIndex = 6;
PlayBtn.Text = "Play";
PlayBtn.UseVisualStyleBackColor = true;
PlayBtn.Click += new EventHandler(playBtn1_Click);
return PlayBtn;
}
public BMS_main()
{
int startPos = 5;
int endPos = 5;
for (int i = 1; i <= playlistCountInc; i++)
{
playListGrp = addplayListGrp(i, startPos, endPos);
playListLbl = addLabel(i);
Label playListLblTime = addLabelTime(i);
Button PlayBtn = addPlayBtn(i);
}
playListGrp.Controls.Add(playListLbl);
playListGrp.Controls.Add(playListLblTime);
playListGrp.Controls.Add(playlistView);
playListGrp.Controls.Add(PlayBtn);
}
private void playBtn1_Click(object sender, EventArgs e)
{
if (ScreenStatus)
{
Playing = true;
DisplayTimer.Stop();
DisplayTimer.Enabled = false;
InitialScreenTimer.Stop();
InitialScreenTimer.Enabled = false;
PlayListTimer.Enabled = true;
PlayListTimer.Start();
}
else
{
message = "Veuillez alimenter les panneaux";
result = MessageBox.Show(message, caption, buttons);
}
public void PlayListTimer_Tick(object sender, EventArgs e)
{
Label lblAcessorio4 =
(Label)playListLbl.Controls.Find("playLbl4",
true).FirstOrDefault();
if (lblAcessorio4 != null)
{
lblAcessorio4.Text = "Test lblAcessorio4";
}
else
{
message = "Label is null";
result = MessageBox.Show(message, caption, buttons);
}

Answer 1

Set the Tag property of your button with something which will help you decide later on which song to play:
playListGrp = addplayListGrp(i, startPos, endPos);
playListLbl = addLabel(i);
Label playListLblTime = addLabelTime(i);
Button PlayBtn = addPlayBtn(i);
// You can do this
PlayBtn.Tag = playListGrp; // or anything else
Then in the button click handler, get the value of the Tag and make a decision based on that. Just keep in mind that whatever you set the Tag to, you will need to cast it back to that type. For example, in the above I set it GroupBox so I will cast it to a GroupBox:
private void playBtn1_Click(object sender, EventArgs e)
{
GroupBox gb = ((Button)(sender)).Tag as GroupBox;
// Now make the decision
if(gb.Name == "whatever you need to put here"){ // do whatever }
}
I would put the lisbox and then get the selected item and play that.