| externFP InitTask call InitTask ; Initialize a task. |
The InitTask function initializes the task by setting registers, setting up the command line, and initializing the heap. This must be the first function called by the startup routine for the application.
This function has no parameters.
This function returns 1 in the AX register and fills the CX, DX, ES:BX, SI, and DI registers with information about the new task, if the function is successful. Otherwise, it returns zero in the AX register to indicate an error.
When the function is successful, other registers contain the following values:
| Register | Value |
| CX | Contains the stack limit, in bytes. The startup routines should check the limit to ensure there is a minimum of 100 bytes in the stack. |
| DI | Contains the instance handle for the new task. The startup routine passes this address to the WinMain function. |
| DX | Contains an nCmdShow parameter. The startup routine passes this parameter to the WinMain function for use with the CreateWindow function. |
| ES | Contains the segment address of the program segment prefix (PSP) for the new task. |
| ES:BX | Contains the 32-bit address of the command line (MS-DOS format). The startup routine passes this address to the WinMain function. |
| SI | Contains the instance handle for the previous instance of the application, if any. The startup routine passes this address to the WinMain function. |
The InitTask function also copies the top, minimum, and bottom address offsets of the stack to the 16 bytes of reserved memory at the beginning of the automatic data segment for the application. The reserved memory has the following format:
DW 0
globalW oOldSP,0
globalW hOldSS,5
globalW pLocalHeap,0
globalW pAtomTable,0
globalW pStackTop,0
globalW pStackMin,0
globalW pStackBot,0