How handle when mouse leaves form during drag and drop [closed] - vb.net

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I have my form set up to be able to drop files into a textbox, and also drag the files out of the textbox, thus clearing the textbox. The kicker is that the drag out of the textbox has to be dropped on the form. If I try to drag it outside the form, then it crashes. I would like for the drag and drop to ignore when the mouse is moved outside of the form. Any ideas? Here's the error I get when I drag the file out of the textbox and out of the form:
Invalid FORMATETC structure (Exception from HRESULT: 0x80040064 (DV_E_FORMATETC))

You can keep the cursor inside of the form. Cursor.Clip
MouseDown event:
Cursor.Clip = Me.RectangleToScreen(Me.ClientRectangle)
MouseUp Event:
Cursor.Clip = Nothing

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If Statement for When button is clicked [closed]

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I am trying to write an If statement in VBA that is somewhat in this format:
If Button A is clicked
Then
Open a file
End If
I am stuck at the first part where I am not sure how to write the portion for the "If Button A is clicked". Would greatly appreciate any advice on this.
Code
The expected result would be that the file opens when the user presses button A and specifies the location of the file that is to be opened.
A button being clicked is an ephemeral event that happens, not state that you can test with an "if". Set an event handler to call the code when the button is clicked, and don't worry about an "if".

Message Boxes not showed [closed]

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net Programmers
I am in a trouble
I want to display messagebox after a while of time
i did this but the problem is that the messagebox appears behind the other windows of the active programs
I want a code that displays the messagebox over all opened windows to make the user see it
and THANKS
You can't set TopMost on a message box. However, you could create your own class/dialog set TopMost to true on it and then use ShowDialog to display it.

How to obtain data from one form to another? [closed]

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User clicks select colour in Form1, it opens Form2- they click red and click the button "Choose". Form2 closes, and the colour is set as a variable in Form1. How do I do this? Any code samples?
Yes, this is possible. You can do something called passing variables between forms.
You can do this by making a textbox/combobox a public property from the modifiers menu in design view
Look here for information on passing variables between forms.
Also P.S - Show some of your working first, before posting just for code!

Trigger an event on clicking "OK" on the messagebox in an access form [closed]

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I have an access form in which after the user performs few operations a message box will appear. When the user clicks "OK" on the message box I want to close the current form and open a new form. How can I do this?
the VBA code execution is suspended until the user clicks ok. Therefore the next line of code after the msgbox call will be your spot to do the 'magic'
You want to open the new form first, then close the current form.
You can either do it by just putting the code directly after the MsgBox command, or by checking the response of the user in a multi-response messagebox. For example:
If MsgBox("Do you really want to continue?" & vbCrLf, vbYesNo) = vbYes Then
DoCmd.Close MyFormName
Else
...Perform some other function
End If
This will pop up a messagebox with both Yes and No buttons, and allows you to run some alternate code if the response is No.

How to set NStextfield displayed as **** return character when checkbox in cocoa [closed]

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I'm a newbiwe. I building a mac app, i want to set type input in password textfield displayed as **. And then user check on Checkbox, text in password textfield displayed normal. I created NStextfield and Checkbox programmitically. Thanks for your help.
Take a look at KSPasswordField...
From the page:
Shows the password in plain text on-demand
On the basis that password visibility is likely being toggled for editing, makes the field the first responder
Automatically cleans up likely unwanted whitespace when pasting or dragging in passwords
To make it work:
Add KSPasswordField.h and KSPasswordField.m to your project.
In Interface Builder, create a regular NSSecureTextField and then set
its custom class to be KSPasswordField.
(Or, in your case, programatically create a KSPasswordField instead of an NSTextField)
Hook up a checkbox (NSButton) to the toggleTextShown: action of your KSPasswordField. In your case, do this:
[myCheckbox setTarget:myPasswordField];
[myCheckbox setAction:#selector(toggleTextShown:)];