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**BOOL**

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BOOL is used to declare variables to store Boolean values, TRUE(1) and FALSE(0).

**Example:**

**MainForm.ProfitReport PROCEDURE(System.Object sender, System.EventArgs e)**

**Frm   &System.Windows.Forms.Form**

**FrmFound BOOL**

** CODE**

**  FrmFound = FALSE**

**  Frm &= NULL**

**  FOREACH Frm IN SELF.MdiChildren**

**   IF Frm IS Warehouse.ProfitReportForm THEN**

**    FrmFound = TRUE**

**    BREAK**

**   END**

**  END**

**  IF FrmFound THEN**

**   Frm.Activate()**

**  ELSE**

**   Frm &= NEW Warehouse.ProfitReportForm**

**   Frm.MdiParent &= SELF**

**   Frm.Show()**

**  END**

BOOL can also be set through Boolean operators that connect string, numeric, or logical expressions together to determine true-false logic.

**Example:**

**IsNext = (ERRORCODE() = 0)  !IF ERRORCODE() returns zero, the expression is**

**                            !true, and IsNext = TRUE**