RAD Studio VCL Reference
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System.varSingle Constant

Represents a Variant that holds byte data.

Pascal
varSingle = $0004;
C++
varSingle = 0x0004;

To define a Variant to be a varSingle type, you should use VarAsType to create one. By default, a Variant with a floating point value with less than 4 decimal places will be assigned the varCurrency type. With greater than 4 decimal places, it will be assigned by default the varDouble type.  

Use VarType to determine the variant type. 

 

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