Need help passing a string var into a function requiring uint type

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I'm trying to select my Global Hotkey from two drop down lists and then use the values in the RegisterHotKey() function to set the hotkey.

My code below gives an error saying the variables are the wrong data type.

I intend to feed in value selected from my modifier combobox and from my hotkey combobox once this error is corrected.

C#

string keyModifer = "(uint)fsModifiers.Control";
string keyCode = "(uint)Keys.Insert";
RegisterHotKey(_hWnd, 1, keyModifer, keyCode);

Thank you...
[EDIT - OP comment from "solution" (deleted)]

Quote:
know the data types for the function (I said I know my combobox strings are the wrong type).

I'm trying to avoid having to create a long switch statement for each hotkey combination. I'm wondering if there is a way to take my combobox Value and feed it into the function?

I'm not aware if a combobox Value can be of type 'fsModifiers' and of type 'keyCode'. I'm only aware of comboboxes having string and int data types for their value property (neither of which will work straight away on this RegisterHotKey().

[/EDIT]

Posted 26-Jun-14 11:31am

rfresh

Updated 26-Jun-14 12:21pm

CHill60

v2

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[no name] 26-Jun-14 17:42pm

Since the parameters for RegisterHotKey are HWND, int, UINT and UINT, one has to wonder why you are passing strings to that function and then asking why it's not working.

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George Jonsson · Answer 1 · 2014-06-26T16:45:00

Solution 2

Hi,

You can create your own class

C#

public class HotKeyData
{
    public HotKeyData(string friendlyName, uint keyModifier, uint keyCode)
    {
        FriendlyName = friendlyName;
        KeyModifier = keyModifier;
        KeyCode = keyCode;
    }

    public string FriendlyName { get; set; }
    public uint KeyModifier { get; set; }
    public uint KeyCode { get; set; }
}

Then create a list with your class

C#

private List<HotKeyData> comboList = new List<HotKeyData>();

In e.g. Form_Load you add data to the list

C#

comboList.Add(new HotKeyData("Key1", 1, 11));
comboList.Add(new HotKeyData("Key2", 2, 12));
comboList.Add(new HotKeyData("Key3", 3, 13));
comboList.Add(new HotKeyData("Key4", 4, 14));

Then bind the list to the combobox

C#

comboBox1.DataSource = comboList;
comboBox1.DisplayMember = "FriendlyName";

Implement one event for the combo box.

C#

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
  HotKeyData keyData = (HotKeyData)comboBox1.SelectedItem;
  RegisterHotKey(_hWnd, 1, keyData.KeyModifier, keyData.KeyCode);
}

At least I think this is what you want.

Posted 26-Jun-14 16:45pm

George Jonsson

Comments

rfresh 27-Jun-14 1:26am

I'm getting an error on this line: The name 'RegisterHotKey' does not exist in the current content.

<pre lang="xml"><pre lang="c#">
RegisterHotKey(_hWnd, 1, keyData.KeyModifier, keyData.KeyCode);
</pre></pre>

Same for the _hWnd argument.

I tried to add:

<pre lang="c#">this._hWnd = hWnd;</pre>

but that also has an error.

George Jonsson 27-Jun-14 2:20am

As you used RegisterHotKey in your initial question, I assumed that you already had a reference to that method.

rfresh 27-Jun-14 2:23am

yes...i do...i need the using statement in the new class right?

George Jonsson 27-Jun-14 3:11am

Well, I can't see your complete code.
The combo box event is normally implemented in your main form code.
Here you need to have a reference the method RegisterHotKey.
//George

rfresh 27-Jun-14 12:27pm

I got it working...thanks for the help.
I use this code on form load:
thisWindow = FindWindow(null, "ChecklistForm");
UnregisterHotKey(thisWindow, 1);
HotKeyModifier keyDataModifier = (HotKeyModifier)cboHotKeyModifier.SelectedItem;
HotKey keyData = (HotKey)cboHotKey.SelectedItem;
RegisterHotKey(thisWindow, 1, keyDataModifier.KeyModifier, keyData.KeyCode);

and then I use the same code on the combobox SelectedIndexChanged() and then I try the new hotkey and it doesn't fire on the keyPressed.Msg == 0x0312 in WndProc().

I UnregisterHotKey() first and then I try to registerHotKey() again in the combobox SelectedIndexChanged event.

Is there something else I have to do when I use the combobox to change the hot key to get it to work again?

rfresh 27-Jun-14 16:35pm

I figured out my thisWindow var had a different value when I clicked on the combobox to change hot keys. Prior to selecting a new hot key I pressed the prev HK to show and hide the window. Maybe that action changed the line
thisWindow = FindWindow(null, "ChecklistForm");
from returning the same thisWindow ID from them the app first ran and set the hot key.
I created a global var to hold that initial value and use it in the combo selectedIndexChange event and it seems to now work. I can select a new hot key and it responds.

George Jonsson 27-Jun-14 21:19pm

Glad that I could help.

Have you tried this way for the windows handle?
IWin32Window wnd = this;
RegisterHotKey(wnd.Handle, 1, keyDataModifier.KeyModifier, keyData.KeyCode);
Not sure it makes a difference.

George Jonsson 27-Jun-14 22:17pm

If my answer helped you, you should mark your question as solved.