Reset Hotkeys with Label Name Drop-Through Behavior (AutoHotkey Tip)

Sometimes Not Encapsulating Hotkeys with the Return Command Serves a Purpose

Last time, I discussed how to change the transparency level of any window under the mouse cursor with a scroll of the mouse wheel. The SeeThruWinWheel.ahk works great, but, if you increase the invisibility of the window too much, you might lose track of the window. We need a technique for instantly bringing a window instantly back into view. I did that with a trick from the blog “Understanding Label Names and Subroutines (Beginning AutoHotkey Tip).”

AutoHotkey Library Deal
AutoHotkey Library Deal

While studying the behavior of Label names in AutoHotkey scripts, I came up with the CheeseBurgerRecipe.ahk script which automatically moves to the next Hotkey recipe step with no additional code by dropping pass the next Label name directly into its subroutine. I didn’t expect to find another use for this technique so soon, but when I encountered the problem of losing track of invisible windows, this technique offered a quick fix. Continue reading

Understanding AutoHotkey %Var% Variable Text Replacement (AutoHotkey Tip)

Handy Window Transparency Wheel Using Macro Replacement Quickly Peeks Under a Window without Moving It, Plus the Difference Between % Var and %Var% Made Easy

The AutoHotkey online documentation goes into great detail about the traditional method for retrieving values from variables (%Var%) and the force expression evaluation method (% Var). It can take the new AutoHotkey user a little while to comprehend the differences between the two. In an effort to clarify the variations and help beginners to understand when to use which method, I offer an alternative way to view the operations. For the traditional method, I prefer using the terms macro substitution or variable name replacement. Once, you understand how it works, differentiating when and how to use each technique becomes easy.

The value-added trick comes when creating variables containing new variables on-the-fly by combining the two methods (i.e. forcing an expression % which contain a %Var% variable name replacement). The first step involves replacing the variable with its value, the new variable name (%Var%). The second step requires the forced evaluation of the new variable (% VarValue) as part of an expression.

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Volume Control
Volume Wheel

A while back I installed a volume control operated by the mouse scroll wheel. Simply hover over the Windows Task Bar and scroll the mouse wheel up or down to adjust the PC speaker volume level higher or lower, respectively. A progress bar (shown at right) pops up displaying the changing volume level. I’ve added this convenient tool to my standard AutoHotkey script and use it all the time.

Tranparency Menu
Transparency Menu

At a later date, while playing with window visibility, I set up a menu for changing the transparency level for the active window (shown at left). At the end of that blog, I suggested, “If you want to get really fancy, then you might use the mouse wheel to set the transparency (or opaqueness) level.” I’ve done just that with my new SeeThruWinWheel.ahk script. Now, by holding down the CTRL key while scrolling the mouse wheel, the window under the mouse cursor becomes less opaque (WheelDown) or more opaque (WheelUp). In the course of writing this short script, I implemented a number of AutoHotkey tricks worth discussing. Continue reading

Stop Accidental Deletions with the BlockInput Command (AutoHotkey Tip—Part Two)

AutoHotkey BlockInput Command May Cause Stuck Keys! Fix It with the KeyWait Command

In the last blog, we dealt with the issue of setting the privilege level required to use the BlockInput command. In the BackupText.ahk and IncrementalSaveText.ahk scripts, the AutoHotkey command prevents user mouse/keyboard input while the script selects and copies text to the Windows Clipboard, but it doesn’t work without Administrator privileges. After raising the script to a higher level, we demonstrated how to use Windows Task Manager to bypass the User Account Control (UAC) warning window.

At the end of the blog, I mentioned an additional problem where BlockInput causes keys (usually one or more from the Hotkey combination) to stick in the down position. Here’s the trouble. Continue reading

Stop Accidental Deletions with the BlockInput Command (AutoHotkey Tip—Part One)

Ever Wonder Why You Might Want to Block Keyboard and Mouse Input? Here’s One Reason to Use the BlockInput AutoHotkey Command, Plus the Associated Problems

I added the BlockInput command to both the BackupText.ahk and IncrementalSaveText.ahk scripts. I did this to prevent the accidental deletion of the target text by an errant press of a key.

To check out whether the command operated or not, I added a time delay to the script looking for the halting of keyboard and mouse action with BlockInput On. It didn’t work! My experiment demonstrated that the BlockInput command blocked nothing. There’s a good reason for this. Continue reading