🚀 MiniGUI Extended Edition – Build 26.07 Update 1 Now Available!
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Grigory Filatov
Jul 22, 2026, 3:26:36 AM (yesterday) Jul 22
to Harbour Minigui
Dear MiniGUI Community,
We're pleased to announce the release of MiniGUI Extended Edition – Build 26.07 Update 1 (2026/07/22).
This maintenance update focuses on reliability and documentation. It restores the correct Win32 handling of mouse wheel events in the BROWSE control while preserving the familiar scrolling behavior, and includes significant improvements to several sample applications through enhanced documentation, robustness, and code clarity.
🔹 Highlights
* BROWSE Control
* Fixed mouse wheel processing using the proper Win32 `GET_WHEEL_DELTA_WPARAM()` macro while preserving the existing scrolling behavior.
* Sample Improvements
* Browse Scopes: Enhanced database environment save/restore, improved error handling, and expanded integration documentation.
* DBF Header Info: Added comprehensive technical notes and significantly improved source documentation.
* System Metrics: Expanded professional inline documentation while preserving the original code and behavior.
📥 Downloads
STANDARD Build
Compatible with Borland C++ 5.8.2
https://hmgextended.com/files/CONTRIB/hmg-26.07.1-setup.zip
⚠ This build is NOT recommended for production use.
---
🔐 PROFESSIONAL Build
Production-ready, stable, and recommended for serious development and deployment.
Downloads:
https://hmgextended.com/files/CONTRIB/hmg-26.07.1-pro.7z
https://hmgextended.org/files/CONTRIB/hmg-26.07.1-pro.7z
The password for the PROFESSIONAL build is shared with MiniGUI donors and supporters.
This update has been thoroughly tested and is recommended for all users of Build 26.07.
---
Our sincere thanks go to everyone who reports issues, contributes improvements, tests new releases, and supports the MiniGUI project.
Special thanks to Eladio Bravo for reporting the BROWSE control issue.
Warm regards,
Grigory Filatov
on behalf of the MiniGUI Team
We're pleased to announce the release of MiniGUI Extended Edition – Build 26.07 Update 1 (2026/07/22).
This maintenance update focuses on reliability and documentation. It restores the correct Win32 handling of mouse wheel events in the BROWSE control while preserving the familiar scrolling behavior, and includes significant improvements to several sample applications through enhanced documentation, robustness, and code clarity.
🔹 Highlights
* BROWSE Control
* Fixed mouse wheel processing using the proper Win32 `GET_WHEEL_DELTA_WPARAM()` macro while preserving the existing scrolling behavior.
* Sample Improvements
* Browse Scopes: Enhanced database environment save/restore, improved error handling, and expanded integration documentation.
* DBF Header Info: Added comprehensive technical notes and significantly improved source documentation.
* System Metrics: Expanded professional inline documentation while preserving the original code and behavior.
📥 Downloads
STANDARD Build
Compatible with Borland C++ 5.8.2
https://hmgextended.com/files/CONTRIB/hmg-26.07.1-setup.zip
⚠ This build is NOT recommended for production use.
---
🔐 PROFESSIONAL Build
Production-ready, stable, and recommended for serious development and deployment.
Downloads:
https://hmgextended.com/files/CONTRIB/hmg-26.07.1-pro.7z
https://hmgextended.org/files/CONTRIB/hmg-26.07.1-pro.7z
The password for the PROFESSIONAL build is shared with MiniGUI donors and supporters.
This update has been thoroughly tested and is recommended for all users of Build 26.07.
---
Our sincere thanks go to everyone who reports issues, contributes improvements, tests new releases, and supports the MiniGUI project.
Special thanks to Eladio Bravo for reporting the BROWSE control issue.
Warm regards,
Grigory Filatov
on behalf of the MiniGUI Team
Marcelo Antonio Lázzaro Carli
Jul 22, 2026, 8:57:51 AM (yesterday) Jul 22
to Grigory Filatov, Harbour Minigui
Thank you
Marcelo A. L. Carli
Malc Informática — Gestão em Saúde Ocupacional
📍 Marília/SP — Capital Nacional do Alimento ®
🌐 https://malc-informatica.ueniweb.com
📱 Instagram: @malcarli25
--
Visit our website on https://www.hmgextended.com/ or https://www.hmgextended.org/
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Grigory Filatov
3:02 AM (8 hours ago) 3:02 AM
to Harbour Minigui
Hi Friends,
Here's an explanation of the improved mouse wheel scrolling handling introduced in this update..
1. The original code is logically incorrect
The original assumes the wheel delta is only ever either:
* +WHEEL_DELTA (typically +120)
* anything else (treated as downward scrolling)
IF nr == WHEEL_DELTA
// scroll up
ELSE
// scroll down
ENDIF
The problem is that GET_WHEEL_DELTA_WPARAM() returns a signed value, not a boolean. According to the Win32 API:
* +120 = one wheel notch forward
* -120 = one wheel notch backward
* +240, -240, etc. = multiple notches
* high-resolution wheels may generate smaller accumulated values depending on how messages are processed
So the original incorrectly treats every value except exactly +120 as a downward scroll.
Examples:
| nr | Original | Correct |
| ---- | -------- | ------------- |
| +120 | Up | Up |
| -120 | Down | Down |
| +240 | Down ❌ | Up |
| +360 | Down ❌ | Up |
| +60 | Down ❌ | Up (positive) |
| 0 | Down ❌ | No action |
---
2. The improved code handles the sign correctly
IF nr > 0
...
ELSEIF nr < 0
...
ENDIF
This matches the Win32 semantics.
It correctly handles:
* +120
* +240
* +360
* accumulated wheel values
* future hardware
* ignores zero
This is much more robust.
---
3. It also correctly ignores zero
The original:
ELSE
means even
nr == 0
causes a page down.
That's wrong.
The improved version:
ELSEIF nr < 0
does nothing for zero.
That is exactly what should happen.
---
4. Compatibility with modern mice
Modern hardware is no longer limited to discrete ±120 wheel messages.
Examples include:
* precision wheels
* free-spinning wheels (e.g. Logitech HyperScroll)
* touchpads emulating wheel events
* high-resolution HID devices
Microsoft's documentation recommends testing the sign of the delta rather than assuming only ±120 values.
---
Even better implementation
If this routine only performs one page movement regardless of magnitude, then
IF nr > 0
...
ELSEIF nr < 0
...
ENDIF
is ideal.
---
Should this change be included in MiniGUI core?
Yes.
Reasons:
* It fixes a real logic bug.
* It is fully backward compatible for normal mice (±120 still behaves identically).
* It improves compatibility with modern input devices.
* It prevents incorrect scrolling for larger positive deltas.
* It correctly ignores nr == 0 instead of scrolling down.
It's a correctness fix rather than a behavioral redesign.
---
Verdict
The improved implementation is the better one because it:
* ✔ correctly interprets the sign of the wheel delta
* ✔ handles values larger than ±120
* ✔ ignores zero deltas
* ✔ follows Win32 WM_MOUSEWHEEL semantics
* ✔ is more future-proof while remaining backward compatible
For a framework like MiniGUI, this is exactly the kind of small, low-risk correctness improvement that belongs in the core library.
The original assumes the wheel delta is only ever either:
* +WHEEL_DELTA (typically +120)
* anything else (treated as downward scrolling)
IF nr == WHEEL_DELTA
// scroll up
ELSE
// scroll down
ENDIF
The problem is that GET_WHEEL_DELTA_WPARAM() returns a signed value, not a boolean. According to the Win32 API:
* +120 = one wheel notch forward
* -120 = one wheel notch backward
* +240, -240, etc. = multiple notches
* high-resolution wheels may generate smaller accumulated values depending on how messages are processed
So the original incorrectly treats every value except exactly +120 as a downward scroll.
Examples:
| nr | Original | Correct |
| ---- | -------- | ------------- |
| +120 | Up | Up |
| -120 | Down | Down |
| +240 | Down ❌ | Up |
| +360 | Down ❌ | Up |
| +60 | Down ❌ | Up (positive) |
| 0 | Down ❌ | No action |
---
2. The improved code handles the sign correctly
IF nr > 0
...
ELSEIF nr < 0
...
ENDIF
This matches the Win32 semantics.
It correctly handles:
* +120
* +240
* +360
* accumulated wheel values
* future hardware
* ignores zero
This is much more robust.
---
3. It also correctly ignores zero
The original:
ELSE
means even
nr == 0
causes a page down.
That's wrong.
The improved version:
ELSEIF nr < 0
does nothing for zero.
That is exactly what should happen.
---
4. Compatibility with modern mice
Modern hardware is no longer limited to discrete ±120 wheel messages.
Examples include:
* precision wheels
* free-spinning wheels (e.g. Logitech HyperScroll)
* touchpads emulating wheel events
* high-resolution HID devices
Microsoft's documentation recommends testing the sign of the delta rather than assuming only ±120 values.
---
Even better implementation
If this routine only performs one page movement regardless of magnitude, then
IF nr > 0
...
ELSEIF nr < 0
...
ENDIF
is ideal.
---
Should this change be included in MiniGUI core?
Yes.
Reasons:
* It fixes a real logic bug.
* It is fully backward compatible for normal mice (±120 still behaves identically).
* It improves compatibility with modern input devices.
* It prevents incorrect scrolling for larger positive deltas.
* It correctly ignores nr == 0 instead of scrolling down.
It's a correctness fix rather than a behavioral redesign.
---
Verdict
The improved implementation is the better one because it:
* ✔ correctly interprets the sign of the wheel delta
* ✔ handles values larger than ±120
* ✔ ignores zero deltas
* ✔ follows Win32 WM_MOUSEWHEEL semantics
* ✔ is more future-proof while remaining backward compatible
For a framework like MiniGUI, this is exactly the kind of small, low-risk correctness improvement that belongs in the core library.
среда, 22 июля 2026 г. в 09:26:36 UTC+2, Grigory Filatov:
Ross McKenzie
7:36 AM (3 hours ago) 7:36 AM
to Grigory Filatov, Harbour Minigui
Agree.
--
Visit our website on https://www.hmgextended.com/ or https://www.hmgextended.org/
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