Programming Visual Basic for the Palm OS (O'Reilly Palm) by Matthew Holmes, Patrick Burton, Roger Knoell

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By Matthew Holmes, Patrick Burton, Roger Knoell

Solid ebook from views: if you happen to use AppForge for Palm improvement then it is a whole (slightly dated) e-book, or in case you use MS VB6 for conduits or Palm-flavored net purposes with IIS. nearly every thing within the e-book is sponsored up with operating code.

As an apart, it's not that i am yes if the former reviewer truly learn the booklet or attempted to run the code. There are only a few typos within the bankruptcy pointed out (which is on-line) and that i did not see any mistakes. For me, the code labored high-quality; the publication particularly mentions VB6 and repair pack three.

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Extra info for Programming Visual Basic for the Palm OS (O'Reilly Palm)

Sample text

All characters stored in fixed-length strings are Unicoded. 4 Arrays The biggest restriction is the lack of support for dynamic arrays. All arrays must be statically dimensioned arrays. AppForge made a conscious decision to not store any bookkeeping information about the array during runtime in order to increase speed and save memory. Since bookkeeping information is not stored, the Lbound and Ubound methods are not applicable. Array bounds must be positive and dimensioned with at least one element.

This method can be useful as a programmatic check to ensure that your shift indicator is enabled per the note above, despite what is seen (or not seen) on the display. 3 Data transfer There are three methods to help you find and locate databases on the device and then send them via beaming to another device. You'll need to provide the Type ID and Creator ID of the database you are looking for to the GetFirstDatabaseName method, which will search for and return the first database that matches these parameters.

You will notice that the Type and Creator ID parameters are actually long values. What GetFirstDatabaseName expects is the conversion of the ASCII values of the letters in the parameter's decimal number. To get this number, you first convert the individual letters to hexadecimal and place them side by side to create a number that then is converted to a decimal. For example, if you created a database and gave it a type of DATA, then the value is calculated as follows: (D=44,A=41,T=54,A=41) = 44415441, then converted to decimal = 1145132097 Below is a function from the AppForge web site that performs the conversion for you.

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