Technical Support - PPR. Search Community and Knowledge Base. Sign in to ask the community. Home Technical Support Why should I register? Mobile Computers. System Article Number. Last Modified Date. Why does my EVB application not work?
Internet Discussion Groups Set your Internet newsreader to a news server such as msnews. Web Sites In addition to Microsoft's mobile area mentioned earlier and the official www. Some examples are www. Previous page. Table of content. Next page. Note To download eMbedded Visual Basic, visit www. The Pocket PC emulator can be "turned off" by clicking the power button at the bottom of the screen. Locating Help In the following sections, we will introduce the basics of creating a Pocket PC application.
Keep in mind the following resources when searching for information: Help Files Select Contents from the Help menu and you will find extensive help files installed on your hard drive. After you have saved the data, you can now inform the user that the record was entered, hide the form and refresh the grid.
Listing 11 demonstrates the completed save routine. To further protect data integrity, you can limit the types of entries done in text boxes. For example, you could limit Quantity and Cost to be only numeric, trapping keystrokes and rejecting any non-numeric entries, but allowing dots and backspaces. Finally, you can create a separate module to contain global procedures or functions that are called from anywhere in the application. Create a new module by clicking Add Module in the Project menu.
This activates the code editor. Listing 13 demonstrates code that refreshes the grid on Form1 with your application data. Due to magazine column formatting considerations, the code listings are narrow. Lines are normally broken with the continuation character Underscore but be aware that there is a known bug in eVB where these do not always get recognized properly. This example is a simple program. It lacks features like strong error handling and contains only some error prevention. In a real-world application, you would add more defensive programming measures, including a more robust error handling scheme.
The wizard collects all the necessary components used by your application and bundles them into one package. When the installation application runs on a target device, it automatically installs and registers all the components needed by the application.
The uses of this technology are unlimited. Coupled with wireless modems or ActiveSync connections to a desktop system, you can write programs for a sales force on the field.
Doctors can download a patient case history and take notes when making their rounds. They can then upload to the main database. Adding some ActiveX-like image controls, you can create a real estate application that highlights a property, complete with full color pictures and statistics. My Subscriber Account Advertise Write. Training Home State of.
Staffing Home Looking for Staff? Looking for Work? Contact Us. Dark Kimbie. Published in:. Filed under: Mobile Development VB. The requirements for this application are: Read supermarket item code numbers SKU by either scanning them with a Bar Code Scanner or entering them from the keyboard.
Allow entry of the Brand name, unit cost and quantity. Keep track of the store where it was purchased. Keep track of the date purchased. MDB file. IN is not supported. LIKE works only against varchar data types. WHERE clauses against unsigned data are not supported.
Floating point comparisons are approximate. Testing for equality against floating point values is not supported and returns an invalid field comparison error. Creating the Program Once you have installed eVB and tested your connection to your device, you can begin building an application. Figure 3: Adding the grid control component to the Windows CE project. Figure 5: Form 2 of the Windows CE project.
Figure 4: Form 1 of the Windows project. Setup Code The next set of code is your setup code. Creating the Database Because this is a new database application, you need to create your database from code. Adding Records Once you have a database, you can begin adding records. Deleting Data The next step is to provide a mechanism for deleting data. Text When the data entry form loads, we want to set the controls to default values, reading the current SKU and setting today's date. Errors MsgBox e.
Now get busy and create truly mobile applications! Clear ' disable scrollbars grdItems. RemoveItem 0 grdItems. Refresh MsgBox "Items deleted. Rows Form1.
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